diff --git a/.github/workflows/javadoc.yml b/.github/workflows/javadoc.yml
index c41e0848f..28f85aaf8 100644
--- a/.github/workflows/javadoc.yml
+++ b/.github/workflows/javadoc.yml
@@ -43,7 +43,7 @@ jobs:
         java-version: ${{ matrix.java }}
 
     - name: Build
-      run: mvn -q install -DskipTests
+      run: mvn install -DskipTests
 
     - name: Javadoc
       run: mvn -q "javadoc:aggregate"
diff --git a/boot-agent-test/src/test/java/org/netbeans/html/bootagent/KOFx.java b/boot-agent-test/src/test/java/org/netbeans/html/bootagent/KOFx.java
index 60bc3f556..558dbb044 100644
--- a/boot-agent-test/src/test/java/org/netbeans/html/bootagent/KOFx.java
+++ b/boot-agent-test/src/test/java/org/netbeans/html/bootagent/KOFx.java
@@ -65,7 +65,7 @@ public synchronized void run() {
         boolean notify = true;
         try (var ctx = Fn.activate(p)) {
             if (inst == null) {
-                inst = m.getDeclaringClass().newInstance();
+                inst = m.getDeclaringClass().getConstructor().newInstance();
             }
             result = m.invoke(inst);
             if (result == null) {
diff --git a/boot-fx/src/main/java/org/netbeans/html/boot/fx/FXBrwsr.java b/boot-fx/src/main/java/org/netbeans/html/boot/fx/FXBrwsr.java
index 12c73a298..0856d6e89 100644
--- a/boot-fx/src/main/java/org/netbeans/html/boot/fx/FXBrwsr.java
+++ b/boot-fx/src/main/java/org/netbeans/html/boot/fx/FXBrwsr.java
@@ -137,6 +137,7 @@ public void start(Stage primaryStage) throws Exception {
         start(primaryStage, this.getParameters().getRaw().get(0));
     }
 
+    @SuppressWarnings("unchecked")
     final void start(Stage primaryStage, String callee) {
         BorderPane r = new BorderPane();
         Object[] arr = findInitialSize(callee);
diff --git a/boot-fx/src/main/java/org/netbeans/html/boot/fx/FXGCPresenter.java b/boot-fx/src/main/java/org/netbeans/html/boot/fx/FXGCPresenter.java
index a816725e2..a265e4ed3 100644
--- a/boot-fx/src/main/java/org/netbeans/html/boot/fx/FXGCPresenter.java
+++ b/boot-fx/src/main/java/org/netbeans/html/boot/fx/FXGCPresenter.java
@@ -101,8 +101,7 @@ private static void assertGC(Reference<Object> ref) {
             }
 
             try {
-                System.gc();
-                System.runFinalization();
+                forceGC();
             } catch (Error err) {
                 LOG.log(Level.INFO, "Problems during GCing attempt of " + ref.get(), err);
             }
@@ -111,4 +110,10 @@ private static void assertGC(Reference<Object> ref) {
         LOG.log(Level.FINE, "Good: No GC of {1} for {0} ms.", new Object[]{took, ref.get()});
     }
 
+    @SuppressWarnings("deprecation")
+    private static void forceGC() {
+        System.gc();
+        System.runFinalization();
+    }
+
 }
diff --git a/boot-fx/src/test/java/org/netbeans/html/boot/fx/KOFx.java b/boot-fx/src/test/java/org/netbeans/html/boot/fx/KOFx.java
index 189f0e70b..85578b37e 100644
--- a/boot-fx/src/test/java/org/netbeans/html/boot/fx/KOFx.java
+++ b/boot-fx/src/test/java/org/netbeans/html/boot/fx/KOFx.java
@@ -76,7 +76,7 @@ public synchronized void run() {
         try (var ctx = Fn.activate(p)) {
             assert ctx != null;
             if (inst == null) {
-                inst = m.getDeclaringClass().newInstance();
+                inst = m.getDeclaringClass().getConstructor().newInstance();
             }
             result = m.invoke(inst);
             if (result == null) {
diff --git a/boot-script/src/test/java/net/java/html/boot/script/KOCase.java b/boot-script/src/test/java/net/java/html/boot/script/KOCase.java
index 3f67ddaee..9cf30eb4a 100644
--- a/boot-script/src/test/java/net/java/html/boot/script/KOCase.java
+++ b/boot-script/src/test/java/net/java/html/boot/script/KOCase.java
@@ -75,7 +75,7 @@ public synchronized void run() {
         try (Closeable a = Fn.activate(p)) {
             assert a != null;
             if (inst == null) {
-                inst = m.getDeclaringClass().newInstance();
+                inst = m.getDeclaringClass().getConstructor().newInstance();
             }
             result = m.invoke(inst);
             if (result == null) {
diff --git a/boot-script/src/test/java/net/java/html/boot/script/ScriptEngineCase.java b/boot-script/src/test/java/net/java/html/boot/script/ScriptEngineCase.java
index 409839a59..c3aca6512 100644
--- a/boot-script/src/test/java/net/java/html/boot/script/ScriptEngineCase.java
+++ b/boot-script/src/test/java/net/java/html/boot/script/ScriptEngineCase.java
@@ -23,7 +23,6 @@
 import java.lang.reflect.Method;
 import net.java.html.js.JavaScriptBody;
 import org.netbeans.html.boot.spi.Fn;
-import org.netbeans.html.boot.impl.FnContext;
 import org.testng.IHookCallBack;
 import org.testng.IHookable;
 import org.testng.ITest;
@@ -55,7 +54,7 @@ public String getTestName() {
     public synchronized void executeTest() throws Throwable {
         skipAsyncJavaTestWhenNoPromise();
         // BEGIN: net.java.html.boot.script.ScriptEngineCase#run
-        Object instance = method.getDeclaringClass().newInstance();;
+        Object instance = method.getDeclaringClass().getConstructor().newInstance();
         for (int round = 0;; round++) {
             try (var ctx = Fn.activate(p)) {
                 assert ctx != null;
diff --git a/boot/src/main/java/org/netbeans/html/boot/impl/FnUtils.java b/boot/src/main/java/org/netbeans/html/boot/impl/FnUtils.java
index 2b39d661b..041fb7094 100644
--- a/boot/src/main/java/org/netbeans/html/boot/impl/FnUtils.java
+++ b/boot/src/main/java/org/netbeans/html/boot/impl/FnUtils.java
@@ -270,7 +270,7 @@ private boolean generateBody(boolean hasCode) {
                 super.visitMethodInsn(
                         Opcodes.INVOKESTATIC,
                         "org/netbeans/html/boot/spi/Fn", "isValid",
-                        "(Lorg/netbeans/html/boot/spi/Fn;)Z"
+                        "(Lorg/netbeans/html/boot/spi/Fn;)Z", false
                 );
                 Label ifNotNull = new Label();
                 super.visitJumpInsn(Opcodes.IFNE, ifNotNull);
@@ -294,7 +294,8 @@ private boolean generateBody(boolean hasCode) {
                 }
                 super.visitMethodInsn(Opcodes.INVOKESTATIC,
                         "org/netbeans/html/boot/spi/Fn", "define",
-                        "(Ljava/lang/Class;ZLjava/lang/String;[Ljava/lang/String;)Lorg/netbeans/html/boot/spi/Fn;"
+                        "(Ljava/lang/Class;ZLjava/lang/String;[Ljava/lang/String;)Lorg/netbeans/html/boot/spi/Fn;",
+                        false
                 );
                 Label noPresenter = new Label();
                 super.visitInsn(Opcodes.DUP);
@@ -309,7 +310,8 @@ private boolean generateBody(boolean hasCode) {
                     super.visitLdcInsn(resource);
                     super.visitMethodInsn(Opcodes.INVOKESTATIC,
                             "org/netbeans/html/boot/spi/Fn", "preload",
-                            "(Lorg/netbeans/html/boot/spi/Fn;Ljava/lang/Class;Ljava/lang/String;)Lorg/netbeans/html/boot/spi/Fn;"
+                            "(Lorg/netbeans/html/boot/spi/Fn;Ljava/lang/Class;Ljava/lang/String;)Lorg/netbeans/html/boot/spi/Fn;",
+                            false
                     );
                 }
                 super.visitInsn(Opcodes.DUP);
@@ -387,7 +389,7 @@ public void visitBaseType(char descriptor) {
                                 throw new IllegalStateException(t.toString());
                         }
                         FindInMethod.super.visitMethodInsn(Opcodes.INVOKESTATIC,
-                                factory, "valueOf", "(" + descriptor + ")L" + factory + ";"
+                                factory, "valueOf", "(" + descriptor + ")L" + factory + ";", false
                         );
                         FindInMethod.super.visitInsn(Opcodes.AASTORE);
                     }
@@ -444,13 +446,13 @@ private void loadObject() {
                     int lastSlash = FindInClass.this.name.lastIndexOf('/');
                     String jsCallbacks = FindInClass.this.name.substring(0, lastSlash + 1) + "$JsCallbacks$";
                     FindInMethod.super.visitFieldInsn(Opcodes.GETSTATIC, jsCallbacks, "VM", "L" + jsCallbacks + ";");
-                    FindInMethod.super.visitMethodInsn(Opcodes.INVOKEVIRTUAL, jsCallbacks, "current", "()L" + jsCallbacks + ";");
+                    FindInMethod.super.visitMethodInsn(Opcodes.INVOKEVIRTUAL, jsCallbacks, "current", "()L" + jsCallbacks + ";", false);
                     FindInMethod.super.visitInsn(Opcodes.AASTORE);
                 }
 
                 if (!fia.asyncJavaScript()) {
                     super.visitMethodInsn(Opcodes.INVOKEVIRTUAL,
-                            "org/netbeans/html/boot/spi/Fn", "invoke", "(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;"
+                            "org/netbeans/html/boot/spi/Fn", "invoke", "(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object;", false
                     );
                     switch (sv.returnType.getSort()) {
                         case Type.VOID:
@@ -467,7 +469,7 @@ private void loadObject() {
                             super.visitJumpInsn(Opcodes.IFNULL, handleNullValue);
                             super.visitTypeInsn(Opcodes.CHECKCAST, "java/lang/Boolean");
                             super.visitMethodInsn(Opcodes.INVOKEVIRTUAL,
-                                    "java/lang/Boolean", "booleanValue", "()Z"
+                                    "java/lang/Boolean", "booleanValue", "()Z", false
                             );
                             super.visitInsn(Opcodes.IRETURN);
                             super.visitLabel(handleNullValue);
@@ -478,13 +480,13 @@ private void loadObject() {
                         default:
                             super.visitTypeInsn(Opcodes.CHECKCAST, "java/lang/Number");
                             super.visitMethodInsn(Opcodes.INVOKEVIRTUAL,
-                                    "java/lang/Number", sv.returnType.getClassName() + "Value", "()" + sv.returnType.getDescriptor()
+                                    "java/lang/Number", sv.returnType.getClassName() + "Value", "()" + sv.returnType.getDescriptor(), false
                             );
                             super.visitInsn(sv.returnType.getOpcode(Opcodes.IRETURN));
                     }
                 } else {
                     super.visitMethodInsn(Opcodes.INVOKEVIRTUAL,
-                            "org/netbeans/html/boot/spi/Fn", "invokeLater", "(Ljava/lang/Object;[Ljava/lang/Object;)V"
+                            "org/netbeans/html/boot/spi/Fn", "invokeLater", "(Ljava/lang/Object;[Ljava/lang/Object;)V", false
                     );
                     super.visitInsn(Opcodes.RETURN);
                 }
@@ -496,7 +498,7 @@ private void loadObject() {
                     super.visitInsn(Opcodes.DUP);
                     super.visitLdcInsn("No presenter active. Use BrwsrCtx.execute!");
                     super.visitMethodInsn(Opcodes.INVOKESPECIAL, 
-                        "java/lang/IllegalStateException", "<init>", "(Ljava/lang/String;)V"
+                        "java/lang/IllegalStateException", "<init>", "(Ljava/lang/String;)V", false
                     );
                     this.visitInsn(Opcodes.ATHROW);
                 }
diff --git a/boot/src/main/java/org/netbeans/html/boot/impl/JavaScriptProcesor.java b/boot/src/main/java/org/netbeans/html/boot/impl/JavaScriptProcesor.java
index f8a7cdbb4..c6cee062a 100644
--- a/boot/src/main/java/org/netbeans/html/boot/impl/JavaScriptProcesor.java
+++ b/boot/src/main/java/org/netbeans/html/boot/impl/JavaScriptProcesor.java
@@ -73,6 +73,7 @@ public final class JavaScriptProcesor extends AbstractProcessor {
     public JavaScriptProcesor() {
     }
 
+    @SuppressWarnings("deprecation")
     @Override
     public Set<String> getSupportedAnnotationTypes() {
         Set<String> set = new HashSet<>();
@@ -152,6 +153,19 @@ public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment
             checkJavaScriptBody(r, e, msg);
         }
 
+        processGroup(roundEnv, msg);
+
+        generateCallbackClass(javacalls);
+        javacalls.clear();
+        if (roundEnv.processingOver()) {
+            generateJavaScriptBodyList(bodies);
+            bodies.clear();
+        }
+        return true;
+    }
+
+    @SuppressWarnings("deprecation")
+    private void processGroup(RoundEnvironment roundEnv, final Messager msg) {
         for (Element e : roundEnv.getElementsAnnotatedWith(JavaScriptResource.Group.class)) {
             JavaScriptResource.Group g = e.getAnnotation(JavaScriptResource.Group.class);
             if (g == null) {
@@ -161,13 +175,6 @@ public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment
                 checkJavaScriptBody(r, e, msg);
             }
         }
-
-        if (roundEnv.processingOver()) {
-            generateCallbackClass(javacalls);
-            generateJavaScriptBodyList(bodies);
-            javacalls.clear();
-        }
-        return true;
     }
 
     private void checkJavaScriptBody(JavaScriptResource r, Element e, final Messager msg) {
@@ -528,7 +535,7 @@ private void generateCallbackClass(Map<String,Map<String, ExecutableElement>> pr
             Map<String, ExecutableElement> map = pkgEn.getValue();
             StringBuilder source = new StringBuilder();
             source.append("package ").append(pkgName).append(";\n");
-            source.append("@java.lang.SuppressWarnings(\"all\")\n");
+            source.append("@java.lang.SuppressWarnings({\"unchecked\", \"all\"})\n");
             source.append("public final class $JsCallbacks$ {\n");
             source.append("  static final $JsCallbacks$ VM = new $JsCallbacks$(null);\n");
             source.append("  private final org.netbeans.html.boot.spi.Fn.Ref<?> ref;\n");
diff --git a/boot/src/test/java/org/netbeans/html/boot/impl/JsClassLoaderBase.java b/boot/src/test/java/org/netbeans/html/boot/impl/JsClassLoaderBase.java
index 04ca4621b..79ca757fe 100644
--- a/boot/src/test/java/org/netbeans/html/boot/impl/JsClassLoaderBase.java
+++ b/boot/src/test/java/org/netbeans/html/boot/impl/JsClassLoaderBase.java
@@ -76,7 +76,7 @@ public void assertClassDefined() {
     
     @Test public void instanceMethod() throws Throwable {
         Method plus = methodClass.getMethod("plusInst", int.class);
-        java.lang.Object inst = methodClass.newInstance();
+        java.lang.Object inst = methodClass.getConstructor().newInstance();
         try {
             assertEquals(plus.invoke(inst, 10), 10);
         } catch (InvocationTargetException ex) {
@@ -94,7 +94,7 @@ public void assertClassDefined() {
     }
 
     @Test public void getThis() throws Throwable {
-        java.lang.Object th = methodClass.newInstance();
+        java.lang.Object th = methodClass.getConstructor().newInstance();
         Method st = methodClass.getMethod("getThis");
         try {
             assertEquals(st.invoke(th), th);
@@ -154,7 +154,7 @@ public void run() {
     
     @Test public void callJavaScriptMethodOnOwnClass() throws Throwable {
         try {
-            java.lang.Object thiz = methodClass.newInstance();
+            java.lang.Object thiz = methodClass.getConstructor().newInstance();
             Method st = methodClass.getMethod("returnYourSelf", methodClass);
             assertEquals(st.invoke(null, thiz), thiz, "Returns this");
         } catch (InvocationTargetException ex) {
@@ -172,6 +172,7 @@ public void run() {
         assertEquals(st.invoke(null, "42"), 42, "Meaning of JavaScript?");
     }
 
+    @SuppressWarnings("unchecked")
     @Test public void passEnum() throws Throwable {
         Class<?> enmClazz = methodClass.getDeclaredClasses()[0];
         assertTrue(Enum.class.isAssignableFrom(enmClazz), "It is an enum: " + enmClazz);
@@ -199,7 +200,7 @@ public void run() {
     
     @Test public void recordError() throws Throwable {
         Method st = methodClass.getMethod("recordError", java.lang.Object.class);
-        assertEquals(st.invoke(methodClass.newInstance(), "Hello"), "Hello", "The same parameter returned");
+        assertEquals(st.invoke(methodClass.getConstructor().newInstance(), "Hello"), "Hello", "The same parameter returned");
     }
     
     @Test public void plusOrMul() throws Throwable {
diff --git a/browser/src/main/java/org/netbeans/html/presenters/browser/Browser.java b/browser/src/main/java/org/netbeans/html/presenters/browser/Browser.java
index 13f7ece51..8ad888ea5 100644
--- a/browser/src/main/java/org/netbeans/html/presenters/browser/Browser.java
+++ b/browser/src/main/java/org/netbeans/html/presenters/browser/Browser.java
@@ -204,6 +204,7 @@ public final void displayPage(URL page, Runnable onPageLoad) {
         }
     }
 
+    @SuppressWarnings("unchecked")
     static <T extends Exception> T raise(Class<T> aClass, Exception ex) throws T {
         throw (T)ex;
     }
@@ -357,7 +358,7 @@ public <Request, Response> void service(HttpServer<Request, Response, ?, ?> serv
                 String prefix = "http://" + server.getServerName(rqst) + ":" + server.getServerPort(rqst) + "/";
                 Writer w = server.getWriter(rspns);
                 server.setContentType(rspns, "text/html");
-                final Command cmd = new Command(server, Browser.this, prefix);
+                final Command<Request, Response, ?> cmd = new Command<>(server, Browser.this, prefix);
                 try {
                     is = new InputStreamReader(page.openStream());
                 } catch (IOException ex) {
@@ -403,7 +404,7 @@ public <Request, Response> void service(HttpServer<Request, Response, ?, ?> serv
                 w.close();
             } else if (path.equals("/command.js")) {
                 String id = server.getParameter(rqst, "id");
-                Command c = SESSIONS.get(id);
+                Command<Request, Response, ?> c = findCommand(id);
                 if (c == null) {
                     server.getWriter(rspns).write("No command for " + id);
                     server.setStatus(rspns, 404);
@@ -461,6 +462,11 @@ public <Request, Response> void service(HttpServer<Request, Response, ?, ?> serv
             }
         }
 
+        @SuppressWarnings("unchecked")
+        private <Request, Response> Command<Request, Response, ?> findCommand(String id) {
+            return SESSIONS.get(id);
+        }
+
         private void emitScript(Writer w, String prefix, String id) throws IOException {
             w.write("  <script id='exec' type='text/javascript'>");
             w.write("\n"
diff --git a/browser/src/test/java/org/netbeans/html/presenters/browser/DynamicHTTP.java b/browser/src/test/java/org/netbeans/html/presenters/browser/DynamicHTTP.java
index cf7cb41e3..93a7de8cc 100644
--- a/browser/src/test/java/org/netbeans/html/presenters/browser/DynamicHTTP.java
+++ b/browser/src/test/java/org/netbeans/html/presenters/browser/DynamicHTTP.java
@@ -42,6 +42,7 @@ final class DynamicHTTP extends Handler {
         server = s;
     }
     
+    @SuppressWarnings("unchecked")
     @Override
     public <Request, Response> void service(HttpServer<Request, Response, ?, ?> s, Request request, Response response) throws IOException {
         if ("/dynamic".equals(s.getRequestURI(request))) {
diff --git a/browser/src/test/java/org/netbeans/html/presenters/browser/KOScript.java b/browser/src/test/java/org/netbeans/html/presenters/browser/KOScript.java
index 2003b503d..f0c206c4b 100644
--- a/browser/src/test/java/org/netbeans/html/presenters/browser/KOScript.java
+++ b/browser/src/test/java/org/netbeans/html/presenters/browser/KOScript.java
@@ -85,7 +85,7 @@ public void run() {
                 updateName.invoke(null, getTestName(), cnt);
             }
             if (inst == null) {
-                inst = m.getDeclaringClass().newInstance();
+                inst = m.getDeclaringClass().getConstructor().newInstance();
             }
             result = m.invoke(inst);
             if (result == null) {
diff --git a/browser/src/test/java/org/netbeans/html/presenters/browser/KoBrowserTest.java b/browser/src/test/java/org/netbeans/html/presenters/browser/KoBrowserTest.java
index b3c7f14b5..e18b8c0e5 100644
--- a/browser/src/test/java/org/netbeans/html/presenters/browser/KoBrowserTest.java
+++ b/browser/src/test/java/org/netbeans/html/presenters/browser/KoBrowserTest.java
@@ -116,7 +116,7 @@ public Object executeScript(String script, Object[] arguments) {
     }
 
     @Override
-    public URI prepareURL(String content, String mimeType, String[] parameters) {
+    public String prepareWebResource(String content, String mimeType, String[] parameters) {
         try {
             final URL baseURL = new URL(JavaScriptUtilities.findBaseURL());
             StringBuilder sb = new StringBuilder();
@@ -132,7 +132,7 @@ public URI prepareURL(String content, String mimeType, String[] parameters) {
             URLConnection c = query.openConnection();
             BufferedReader br = new BufferedReader(new InputStreamReader(c.getInputStream()));
             URI connectTo = new URI(br.readLine());
-            return connectTo;
+            return connectTo.toString();
         } catch (IOException | URISyntaxException ex) {
             throw new IllegalStateException(ex);
         }
diff --git a/browser/src/test/java/org/netbeans/html/presenters/browser/ServerFactories.java b/browser/src/test/java/org/netbeans/html/presenters/browser/ServerFactories.java
index a9997ba9b..48e094b41 100644
--- a/browser/src/test/java/org/netbeans/html/presenters/browser/ServerFactories.java
+++ b/browser/src/test/java/org/netbeans/html/presenters/browser/ServerFactories.java
@@ -47,6 +47,7 @@ public static Object[][] serverFactories() {
         return arr.toArray(new Object[0][]);
     }
 
+    @SuppressWarnings("unchecked")
     static Fn.Presenter[] collect(
         String browserName, Collection<? super ITest> res,
         Class<? extends Annotation> test, Supplier<Class[]> tests
diff --git a/generic/pom.xml b/generic/pom.xml
index e481335b3..59a39be57 100644
--- a/generic/pom.xml
+++ b/generic/pom.xml
@@ -93,6 +93,7 @@
                     </compilerArguments>
                     <testSource>15</testSource>
                     <testTarget>1.8</testTarget>
+                    <failOnWarning>false</failOnWarning>
                 </configuration>
             </plugin>
             <plugin>
diff --git a/generic/src/main/java/org/netbeans/html/presenters/spi/Generic.java b/generic/src/main/java/org/netbeans/html/presenters/spi/Generic.java
index 0e700f330..a19b168d2 100644
--- a/generic/src/main/java/org/netbeans/html/presenters/spi/Generic.java
+++ b/generic/src/main/java/org/netbeans/html/presenters/spi/Generic.java
@@ -1145,7 +1145,7 @@ private static Object createReferenceFor(Object obj) {
     }
 
     private static final class WeakHolder extends PhantomReference<Object> {
-        private static final ReferenceQueue QUEUE = new ReferenceQueue();
+        private static final ReferenceQueue<Object> QUEUE = new ReferenceQueue<>();
         private static final Set<WeakHolder> active = new HashSet<WeakHolder>();
         private final Object knockout;
 
diff --git a/geo/src/main/java/org/netbeans/html/geo/impl/GeoProcessor.java b/geo/src/main/java/org/netbeans/html/geo/impl/GeoProcessor.java
index fc5a34f58..6d9fdfb27 100644
--- a/geo/src/main/java/org/netbeans/html/geo/impl/GeoProcessor.java
+++ b/geo/src/main/java/org/netbeans/html/geo/impl/GeoProcessor.java
@@ -51,12 +51,16 @@
  * @author Jaroslav Tulach
  */
 @ServiceProvider(service=Processor.class)
-@SupportedSourceVersion(SourceVersion.RELEASE_6)
 @SupportedAnnotationTypes({
     "net.java.html.geo.OnLocation"
 })
 public final class GeoProcessor extends AbstractProcessor {
-    private static final Logger LOG = Logger.getLogger(GeoProcessor.class.getName());
+    @Override
+    public SourceVersion getSupportedSourceVersion() {
+        return SourceVersion.latest();
+    }
+    
+    
     @Override
     public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
         boolean ok = true;
diff --git a/geo/src/main/java/org/netbeans/html/geo/impl/JsGLProvider.java b/geo/src/main/java/org/netbeans/html/geo/impl/JsGLProvider.java
index 7503b2acf..4567d7854 100644
--- a/geo/src/main/java/org/netbeans/html/geo/impl/JsGLProvider.java
+++ b/geo/src/main/java/org/netbeans/html/geo/impl/JsGLProvider.java
@@ -98,7 +98,7 @@ public String getLocalizedMessage() {
     @JavaScriptBody(args = {"watch"}, body = "navigator.geolocation.clearWatch(watch);")
     public native void stop(Long watch);
 
-    @JavaScriptBody(args = { "p" }, body = "return p.timestamp;")
+    @JavaScriptBody(args = { "position" }, body = "return position.timestamp;")
     private static native long timeStamp(Object position);
 
     @Override
diff --git a/html4j-maven-plugin/pom.xml b/html4j-maven-plugin/pom.xml
index ab9a1fb4b..8f608987f 100644
--- a/html4j-maven-plugin/pom.xml
+++ b/html4j-maven-plugin/pom.xml
@@ -75,6 +75,7 @@
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-compiler-plugin</artifactId>
             <configuration>
+               <failOnWarning>false</failOnWarning>
                <target>8</target>
             </configuration>
          </plugin>
@@ -85,7 +86,7 @@
       <dependency>
           <groupId>org.apache.maven</groupId>
           <artifactId>maven-plugin-api</artifactId>
-          <version>3.0.4</version>
+          <version>3.8.5</version>
           <type>jar</type>
       </dependency>
       <dependency>
diff --git a/html4j-maven-plugin/src/main/java/org/netbeans/html/mojo/ProcessJsAnnotationsGradle.java b/html4j-maven-plugin/src/main/java/org/netbeans/html/mojo/ProcessJsAnnotationsGradle.java
index b05c91803..85579e0ee 100644
--- a/html4j-maven-plugin/src/main/java/org/netbeans/html/mojo/ProcessJsAnnotationsGradle.java
+++ b/html4j-maven-plugin/src/main/java/org/netbeans/html/mojo/ProcessJsAnnotationsGradle.java
@@ -19,7 +19,6 @@
 
 package org.netbeans.html.mojo;
 
-import java.util.Set;
 import org.gradle.api.Action;
 import org.gradle.api.DefaultTask;
 import org.gradle.api.Plugin;
@@ -38,8 +37,7 @@ public void execute(ProcessJsAnnotationsTask process) {
         p.afterEvaluate(new Action<Project>() {
             @Override
             public void execute(final Project p) {
-                Set<? extends Task> tasks = (Set<? extends Task>) p.property("tasks");
-                for (Task task : tasks) {
+                for (Task task : p.getTasks()) {
                     if (task.getName().startsWith("compile")) {
                         process.dependsOn(task);
                     }
diff --git a/json-tck/src/main/java/net/java/html/js/tests/Bodies.java b/json-tck/src/main/java/net/java/html/js/tests/Bodies.java
index eb4cc4791..9b62970d6 100644
--- a/json-tck/src/main/java/net/java/html/js/tests/Bodies.java
+++ b/json-tck/src/main/java/net/java/html/js/tests/Bodies.java
@@ -89,7 +89,12 @@ final class Bodies {
     @JavaScriptBody(args = { "arr" }, body = "return arr.length;")
     public static native int length(Object[] arr);
     
-    @JavaScriptBody(args = { "o", "vo" }, body = "if (vo) o = o.valueOf(); return typeof o;")
+    @JavaScriptBody(args = { "o", "useValueOf" }, body = """
+        if (useValueOf) {
+            o = o.valueOf();
+        }
+        return typeof o;
+        """)
     public static native String typeof(Object o, boolean useValueOf);
 
     @JavaScriptBody(args = { "b" }, body = "return typeof b;")
diff --git a/json-tck/src/main/java/net/java/html/js/tests/Factorial.java b/json-tck/src/main/java/net/java/html/js/tests/Factorial.java
index b27929533..f493262c3 100644
--- a/json-tck/src/main/java/net/java/html/js/tests/Factorial.java
+++ b/json-tck/src/main/java/net/java/html/js/tests/Factorial.java
@@ -35,5 +35,5 @@ int minusOne(int i) {
         var im1 = this.@net.java.html.js.tests.Factorial::minusOne(I)(i);
         return this.@net.java.html.js.tests.Factorial::factorial(I)(im1) * i;"""
     )
-    native int factorial(int n);
+    native int factorial(int i);
 }
diff --git a/json-tck/src/main/java/net/java/html/js/tests/GCBodyTest.java b/json-tck/src/main/java/net/java/html/js/tests/GCBodyTest.java
index 6083cd5db..c45d7a30c 100644
--- a/json-tck/src/main/java/net/java/html/js/tests/GCBodyTest.java
+++ b/json-tck/src/main/java/net/java/html/js/tests/GCBodyTest.java
@@ -160,16 +160,21 @@ private static void assertGC(Reference<?> ref, String msg) throws InterruptedExc
                 throw new InterruptedException(msg + " - giving up after " + took + " ms at size of " + size);
             }
             
-            try {
-                System.gc();
-                System.runFinalization();
-            } catch (Error err) {
-                err.printStackTrace();
-            }
+            forceGC();
         }
         throw new InterruptedException(msg);
     }
 
+    @SuppressWarnings("deprecation")
+    private static void forceGC() {
+        try {
+            System.gc();
+            System.runFinalization();
+        } catch (Error err) {
+            err.printStackTrace();
+        }
+    }
+
     private static boolean isGone(Reference<?> ref) {
         return ref.get() == null;
     }
@@ -182,12 +187,7 @@ private static void assertNotGC(Reference<?> ref, boolean clearJS, String msg) t
             if (clearJS) {
                 Bodies.gc(Math.pow(2.0, i));
             }
-            try {
-                System.gc();
-                System.runFinalization();
-            } catch (Error err) {
-                err.printStackTrace();
-            }
+            forceGC();
         }
     }
 }
diff --git a/json-tck/src/main/java/net/java/html/js/tests/JsUtils.java b/json-tck/src/main/java/net/java/html/js/tests/JsUtils.java
index 71bc3a58e..23acdbcc0 100644
--- a/json-tck/src/main/java/net/java/html/js/tests/JsUtils.java
+++ b/json-tck/src/main/java/net/java/html/js/tests/JsUtils.java
@@ -72,6 +72,7 @@ static boolean executeNow(Class<?> clazz, String script) {
         }
     }
 
+    @SuppressWarnings("unchecked")
     private static <E extends Throwable> E raise(Class<E> e, Throwable t) throws E {
         throw (E)t;
     }
diff --git a/json-tck/src/main/java/net/java/html/json/tests/GCKnockoutTest.java b/json-tck/src/main/java/net/java/html/json/tests/GCKnockoutTest.java
index 527e4e9e8..3fb6a9763 100644
--- a/json-tck/src/main/java/net/java/html/json/tests/GCKnockoutTest.java
+++ b/json-tck/src/main/java/net/java/html/json/tests/GCKnockoutTest.java
@@ -104,12 +104,17 @@ private void assertGC(Reference<?> ref, String msg) throws Exception {
                         }
                         return arr.length;""";
             Object cnt = Utils.executeScript(GCKnockoutTest.class, gc, Math.pow(2.0, i));
-            System.gc();
-            System.runFinalization();
+            forceGC();
         }
         throw new OutOfMemoryError(msg);
     }
 
+    @SuppressWarnings("deprecation")
+    private static void forceGC() {
+        System.gc();
+        System.runFinalization();
+    }
+
     private void assertNotGC(Reference<?> ref, String msg) throws Exception {
         for (int i = 0; i < 10; i++) {
             if (ref.get() == null) {
@@ -123,8 +128,7 @@ private void assertNotGC(Reference<?> ref, String msg) throws Exception {
                         }
                         return arr.length;""";
             Object cnt = Utils.executeScript(GCKnockoutTest.class, gc, Math.pow(2.0, i));
-            System.gc();
-            System.runFinalization();
+            forceGC();
         }
     }
 
diff --git a/json-tck/src/main/java/net/java/html/json/tests/PhaseExecutor.java b/json-tck/src/main/java/net/java/html/json/tests/PhaseExecutor.java
index 4f6332a59..9536471fb 100644
--- a/json-tck/src/main/java/net/java/html/json/tests/PhaseExecutor.java
+++ b/json-tck/src/main/java/net/java/html/json/tests/PhaseExecutor.java
@@ -44,7 +44,8 @@ private PhaseExecutor(T data) {
     private final RuntimeException alloc;
     private static PhaseExecutor prev;
     */
-    
+
+    @SuppressWarnings("unchecked")
     public static <T> PhaseExecutor<T> schedule(PhaseExecutor[] phases, Init<T> data) throws Exception {
         if (phases[0] == null) {
             phases[0] = new PhaseExecutor<T>(data.initialize());
@@ -76,7 +77,7 @@ public void start() throws Exception {
         }
 
         while (at < tasks.size()) {
-            Action a = tasks.get(at);
+            Action<T> a = tasks.get(at);
             try {
                 a.run(data);
             } catch (Exception | Error ex) {
@@ -94,7 +95,7 @@ public void start() throws Exception {
     }
 
     private final void cleanUp() throws Exception {
-        for (Action a : clean) {
+        for (Action<T> a : clean) {
             a.run(data);
         }
     }
diff --git a/json/src/main/java/net/java/html/json/Models.java b/json/src/main/java/net/java/html/json/Models.java
index 28740d324..acdd10aa9 100644
--- a/json/src/main/java/net/java/html/json/Models.java
+++ b/json/src/main/java/net/java/html/json/Models.java
@@ -177,6 +177,7 @@ public static void applyBindings(Object model, String targetId) {
      * @return full features implementation of mutable and extendable list
      * @since 1.5
      */
+    @SafeVarargs
     public static <T> List<T> asList(T... values) {
         return SimpleList.asList(values);
     }
diff --git a/json/src/main/java/org/netbeans/html/json/impl/JSON.java b/json/src/main/java/org/netbeans/html/json/impl/JSON.java
index 99730a641..801ed9494 100644
--- a/json/src/main/java/org/netbeans/html/json/impl/JSON.java
+++ b/json/src/main/java/org/netbeans/html/json/impl/JSON.java
@@ -21,6 +21,7 @@
 import java.io.EOFException;
 import java.io.IOException;
 import java.io.InputStream;
+import java.lang.reflect.InvocationTargetException;
 import java.util.Collection;
 import net.java.html.BrwsrCtx;
 import org.netbeans.html.context.spi.Contexts;
@@ -348,13 +349,16 @@ static ModelTypes initModelTypes(String preload, String implName) {
         try {
             Class.forName(preload);
             Class<?> clazz = Class.forName(implName);
-            types = (ModelTypes) clazz.newInstance();
-        } catch (ClassNotFoundException ex) {
-            // OK, not supported
-        } catch (NoClassDefFoundError ex) {
+            types = (ModelTypes) clazz.getDeclaredConstructor().newInstance();
+        } catch (
+            InvocationTargetException |
+            IllegalAccessException |
+            ClassNotFoundException |
+            NoClassDefFoundError |
+            NoSuchMethodException |
+            InstantiationException ex
+        ) {
             // OK, not supported
-        } catch (Throwable ex) {
-            ex.printStackTrace();
         } finally {
             if (types == null) {
                 types = new LinkedListTypes();
@@ -383,6 +387,7 @@ static Proto.Type<?> findType(Class<?> clazz) {
         return null;
     }
 
+    @SuppressWarnings("unchecked")
     public static <Model> Model bindTo(Model model, BrwsrCtx c) {
         Proto.Type<Model> from = (Proto.Type<Model>) findType(model.getClass());
         if (from == null) {
@@ -443,7 +448,7 @@ static void initClass(Class<?> modelClazz) {
             if (l != null) {
                 Class.forName(modelClazz.getName(), true, l);
             }
-            modelClazz.newInstance();
+            modelClazz.getDeclaredConstructor().newInstance();
         } catch (Exception ex) {
             // ignore and try again
         }
@@ -501,6 +506,7 @@ public Object toJSON(InputStream is) throws IOException {
             throw new IOException("Not supported");
         }
 
+        @Deprecated
         @Override
         public void runSafe(Runnable r) {
             r.run();
diff --git a/json/src/main/java/org/netbeans/html/json/impl/JSONList.java b/json/src/main/java/org/netbeans/html/json/impl/JSONList.java
index 4bbd80ad1..67cb2bc49 100644
--- a/json/src/main/java/org/netbeans/html/json/impl/JSONList.java
+++ b/json/src/main/java/org/netbeans/html/json/impl/JSONList.java
@@ -41,6 +41,7 @@ public JSONList(Proto proto, String name, int changeIndex, String... deps) {
         this.index = changeIndex;
     }
     
+    @SuppressWarnings("unchecked")
     public void init(Object values) {
         int len;
         if (values == null || (len = Array.getLength(values)) == 0) {
@@ -51,6 +52,8 @@ public void init(Object values) {
             super.add((T)data);
         }
     }
+
+    @SuppressWarnings("unchecked")
     public static <T> void init(Collection<T> to, Object values) {
         int len;
         if (values == null || (len = Array.getLength(values)) == 0) {
diff --git a/json/src/main/java/org/netbeans/html/json/impl/ModelProcessor.java b/json/src/main/java/org/netbeans/html/json/impl/ModelProcessor.java
index 1718346f9..4ee1f450c 100644
--- a/json/src/main/java/org/netbeans/html/json/impl/ModelProcessor.java
+++ b/json/src/main/java/org/netbeans/html/json/impl/ModelProcessor.java
@@ -2079,6 +2079,7 @@ private String findDataSpecified(ExecutableElement e, OnReceive onR) {
         return null;
     }
 
+    @SuppressWarnings("unchecked")
     static List<? extends Object> getAnnoValues(ProcessingEnvironment pe, Element e, AnnotationMirror am) {
         try {
             Class<?> trees = Class.forName("com.sun.tools.javac.api.JavacTrees");
@@ -2152,6 +2153,7 @@ String typeName(ProcessingEnvironment env) {
         }
 
 
+        @SuppressWarnings("unchecked")
         static Prprt[] wrap(ProcessingEnvironment pe, Element e, Property[] arr) {
             if (arr.length == 0) {
                 return new Prprt[0];
diff --git a/json/src/main/java/org/netbeans/html/json/impl/ReactiveTech.java b/json/src/main/java/org/netbeans/html/json/impl/ReactiveTech.java
index ce10980e0..c2478cf2e 100644
--- a/json/src/main/java/org/netbeans/html/json/impl/ReactiveTech.java
+++ b/json/src/main/java/org/netbeans/html/json/impl/ReactiveTech.java
@@ -62,6 +62,7 @@ public Object wrapArray(Object[] arr) {
         return arr;
     }
 
+    @SuppressWarnings("deprecation")
     @Override
     public void runSafe(Runnable r) {
     }
diff --git a/json/src/main/java/org/netbeans/html/json/impl/SimpleList.java b/json/src/main/java/org/netbeans/html/json/impl/SimpleList.java
index 60b7f385b..c70783f37 100644
--- a/json/src/main/java/org/netbeans/html/json/impl/SimpleList.java
+++ b/json/src/main/java/org/netbeans/html/json/impl/SimpleList.java
@@ -38,6 +38,8 @@ private SimpleList(Object[] data) {
         size = data.length;
     }
 
+    @SafeVarargs
+    @SuppressWarnings("varargs")
     public static <T> List<T> asList(T... arr) {
         return new SimpleList<T>(arr);
     }
@@ -89,6 +91,7 @@ public <T> T[] toArray(T[] a) {
         return toArrayImpl(a, 0, size);
     }
 
+    @SuppressWarnings("unchecked")
     final <T> T[] toArrayImpl(T[] a, int from, int to) {
         if (a.length < to - from) {
             a = newArr(a, to - from);
@@ -191,6 +194,7 @@ public void sort(Comparator<? super E> c) {
         sortImpl(c, 0, size);
     }
 
+    @SuppressWarnings("unchecked")
     final void sortImpl(Comparator<? super E> c, int from, int to) {
         for (int i = from; i < to; i++) {
             Object min = arr[i];
@@ -227,6 +231,7 @@ void  clearImpl(int from, int to) {
         size -= to;
     }
 
+    @SuppressWarnings("unchecked")
     @Override
     public E get(int index) {
         checkAccess(index);
@@ -264,6 +269,7 @@ private void ensureSize(int newSize) {
         this.size = ensureAccess(newSize);
     }
 
+    @SuppressWarnings("unchecked")
     @Override
     public E set(int index, E element) {
         checkAccess(index);
@@ -272,11 +278,13 @@ public E set(int index, E element) {
         return prev;
     }
 
+    @SuppressWarnings("unchecked")
     @Override
     public void add(int index, E element) {
         addImpl(index, asList(element));
     }
 
+    @SuppressWarnings("unchecked")
     @Override
     public E remove(int index) {
         checkAccess(index);
@@ -339,6 +347,7 @@ private static boolean equals(Object o1, Object o2) {
         }
     }
 
+    @SuppressWarnings("unchecked")
     private static <T> T[] newArr(T[] a, int size) {
         return (T[]) Array.newInstance(a.getClass().getComponentType(), size);
     }
@@ -613,6 +622,7 @@ public boolean hasNext() {
             return at < max + add;
         }
 
+        @SuppressWarnings("unchecked")
         @Override
         public E next() {
             if (at == max + add) {
@@ -627,6 +637,7 @@ public boolean hasPrevious() {
             return at > min;
         }
 
+        @SuppressWarnings("unchecked")
         @Override
         public E previous() {
             if (at == min) {
diff --git a/json/src/main/java/org/netbeans/html/json/spi/FunctionBinding.java b/json/src/main/java/org/netbeans/html/json/spi/FunctionBinding.java
index bd7d48691..8642d6c5a 100644
--- a/json/src/main/java/org/netbeans/html/json/spi/FunctionBinding.java
+++ b/json/src/main/java/org/netbeans/html/json/spi/FunctionBinding.java
@@ -115,7 +115,7 @@ protected M model() {
         @Override
         public FunctionBinding weak() {
             if (weakSupported) {
-                return new Weak(model, name, index, access);
+                return new Weak<M>(model, name, index, access);
             } else {
                 return this;
             }
diff --git a/json/src/main/java/org/netbeans/html/json/spi/PropertyBinding.java b/json/src/main/java/org/netbeans/html/json/spi/PropertyBinding.java
index ef83ffdb3..46b83060b 100644
--- a/json/src/main/java/org/netbeans/html/json/spi/PropertyBinding.java
+++ b/json/src/main/java/org/netbeans/html/json/spi/PropertyBinding.java
@@ -73,7 +73,7 @@ protected Object read(Proto.Type<?> from, BrwsrCtx c, Object data) {
             @Override
             protected <M> PropertyBinding newBinding(
                 Proto.Type<M> access, Bindings<?> bindings, String name, int index, M model, byte propertyType) {
-                return new Impl(model, bindings, name, index, access, propertyType);
+                return new Impl<M>(model, bindings, name, index, access, propertyType);
             }
         };
         boolean weakOK;
@@ -199,7 +199,7 @@ protected M model() {
         @Override
         public PropertyBinding weak() {
             if (weakSupported) {
-                return new Weak(model, bindings, name, index, access, propertyType);
+                return new Weak<M>(model, bindings, name, index, access, propertyType);
             } else {
                 return this;
             }
diff --git a/json/src/main/java/org/netbeans/html/json/spi/Proto.java b/json/src/main/java/org/netbeans/html/json/spi/Proto.java
index a7071bb7a..34ede5c48 100644
--- a/json/src/main/java/org/netbeans/html/json/spi/Proto.java
+++ b/json/src/main/java/org/netbeans/html/json/spi/Proto.java
@@ -47,13 +47,13 @@
  */
 public final class Proto {
     private final Object obj;
-    private final Type type;
+    private final Type<?> type;
     private final net.java.html.BrwsrCtx context;
     private org.netbeans.html.json.impl.Bindings ko;
     private Observers observers;
     private Observers.Usages usages;
 
-    Proto(Object obj, Type type, BrwsrCtx context) {
+    Proto(Object obj, Type<?> type, BrwsrCtx context) {
         this.obj = obj;
         this.type = type;
         this.context = context;
@@ -222,7 +222,7 @@ public void runInBrowser(final int index, final Object... args) {
             @Override
             public void run() {
                 try {
-                    type.call(obj, index, args, null);
+                    type.callRaw(obj, index, args, null);
                 } catch (Exception ex) {
                     ex.printStackTrace();
                 }
@@ -339,12 +339,12 @@ public void loadJSONWithHeaders(final int index,
         class Rcvr extends RcvrJSON {
             @Override
             protected void onMessage(MsgEvnt msg) {
-                type.onMessage(obj, index, 1, msg.getValues(), params);
+                type.onMessageRaw(obj, index, 1, msg.getValues(), params);
             }
 
             @Override
             protected void onError(MsgEvnt msg) {
-                type.onMessage(obj, index, 2, msg.getException(), params);
+                type.onMessageRaw(obj, index, 2, msg.getException(), params);
             }
         }
         JSONCall call = PropertyBindingAccessor.createCall(
@@ -367,22 +367,22 @@ public Object wsOpen(final int index, String url, Object data) {
         class WSrcvr extends RcvrJSON {
             @Override
             protected void onError(MsgEvnt msg) {
-                type.onMessage(obj, index, 2, msg.getException());
+                type.onMessageRaw(obj, index, 2, msg.getException());
             }
 
             @Override
             protected void onMessage(MsgEvnt msg) {
-                type.onMessage(obj, index, 1, msg.getValues());
+                type.onMessageRaw(obj, index, 1, msg.getValues());
             }
 
             @Override
             protected void onClose(MsgEvnt msg) {
-                type.onMessage(obj, index, 3, null);
+                type.onMessageRaw(obj, index, 3, null);
             }
 
             @Override
             protected void onOpen(MsgEvnt msg) {
-                type.onMessage(obj, index, 0, null);
+                type.onMessageRaw(obj, index, 0, null);
             }
         }
         WS ws = WS.create(JSON.findWSTransfer(context), new WSrcvr());
@@ -486,19 +486,19 @@ final String toStr() {
 
     final Bindings initBindings(Object originalObject) {
         if (ko == null) {
-            Bindings b = Bindings.apply(context);
+            Bindings<?> b = Bindings.apply(context);
             PropertyBinding[] pb = new PropertyBinding[type.properties.size()];
             for (int i = 0; i < pb.length; i++) {
                 final PropertyInfo info = (PropertyInfo) type.properties.get(i);
                 if (info != null) {
-                    pb[i] = b.registerProperty(info.name, i, obj, type, info.type);
+                    pb[i] = type.registerProperty(b, info.name, i, obj, info.type);
                 }
             }
             FunctionBinding[] fb = new FunctionBinding[type.functions.size()];
             for (int i = 0; i < fb.length; i++) {
                 final String fnName = (String) type.functions.get(i);
                 if (fnName != null) {
-                    fb[i] = FunctionBinding.registerFunction(fnName, i, obj, type);
+                    fb[i] = type.registerFunction(fnName, i, obj);
                 }
             }
             ko = b;
@@ -512,7 +512,7 @@ final Bindings getBindings() {
     }
 
     final void onChange(int index) {
-        type.onChange(obj, index);
+        type.onChangeRaw(obj, index);
     }
 
     final Observers observers(boolean create) {
@@ -654,6 +654,10 @@ public Proto createProto(Object obj, BrwsrCtx context) {
         protected abstract void call(Model model, int index, Object data, Object event)
         throws Exception;
 
+        final void callRaw(Object model, int index, Object data, Object event) throws Exception {
+            call(clazz.cast(model), index, data, event);
+        }
+
         /** Re-binds the model object to new browser context.
          *
          * @param model the instance of {@link Model model class}
@@ -678,6 +682,10 @@ protected abstract void call(Model model, int index, Object data, Object event)
          */
         protected abstract void onChange(Model model, int index);
 
+        final void onChangeRaw(Object model, int index) {
+            onChange(clazz.cast(model), index);
+        }
+
         /** Finds out if there is an associated proto-object for given
          * object.
          *
@@ -720,6 +728,10 @@ protected void onMessage(Model model, int index, int type, Object data, Object[]
             onMessage(model, index, type, data);
         }
 
+        final void onMessageRaw(Object model, int index, int type, Object data, Object... params) {
+            onMessage(clazz.cast(model), index, type, data, params);
+        }
+
         //
         // Various support methods the generated classes use
         //
@@ -868,11 +880,16 @@ public final <T> T extractValue(Class<T> type, Object val) {
                 val = val instanceof Number ? ((Number) val).floatValue() : Float.NaN;
             }
             if (type.isEnum() && val instanceof String) {
-                val = Enum.valueOf(type.asSubclass(Enum.class), (String)val);
+                val = enumByName(type, (String)val);
             }
             return type.cast(val);
         }
 
+        @SuppressWarnings("unchecked")
+        private static Object enumByName(Class<?> enumType, String name) {
+            return Enum.valueOf(enumType.asSubclass(Enum.class), name);
+        }
+
         /** Special dealing with array &amp; {@link List} values. This method
          * takes the provided collection, empties it and fills it again
          * with values extracted from <code>value</code> (which is supposed
@@ -885,6 +902,7 @@ public final <T> T extractValue(Class<T> type, Object val) {
          *   value is not an array it is wrapped into array with only element
          * @since 1.0
          */
+        @SuppressWarnings("unchecked")
         public final <T> void replaceValue(Collection<? super T> arr, Class<T> type, Object value) {
             List<T> tmp = Models.asList();
             if (value instanceof Object[]) {
@@ -927,12 +945,20 @@ public final <T> void replaceValue(Collection<? super T> arr, Class<T> type, Obj
                 tmp.add(extractValue(type, value));
             }
             if (arr instanceof JSONList) {
-                JSONList jsList = (JSONList) arr;
+                JSONList<T> jsList = (JSONList<T>) arr;
                 jsList.fastReplace(tmp);
             } else {
                 arr.clear();
                 arr.addAll(tmp);
             }
         }
+
+        final PropertyBinding registerProperty(Bindings<?> b, String name, int index, Object obj, byte type) {
+            return b.registerProperty(name, index, clazz.cast(obj), this, type);
+        }
+
+        final FunctionBinding registerFunction(String fnName, int i, Object obj) {
+            return FunctionBinding.registerFunction(fnName, i, clazz.cast(obj), this);
+        }
     }
 }
diff --git a/json/src/test/java/net/java/html/json/MapModelTest.java b/json/src/test/java/net/java/html/json/MapModelTest.java
index cc5f2d335..3c109d310 100644
--- a/json/src/test/java/net/java/html/json/MapModelTest.java
+++ b/json/src/test/java/net/java/html/json/MapModelTest.java
@@ -484,8 +484,9 @@ public Object toJSON(InputStream is) throws IOException {
         }
 
         @Override
+        @Deprecated
         public void runSafe(Runnable r) {
-            throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+            throw new UnsupportedOperationException("Not supported yet.");
         }
 
         @Override
diff --git a/json/src/test/java/net/java/html/json/ModelTest.java b/json/src/test/java/net/java/html/json/ModelTest.java
index ce19ff50b..80feca173 100644
--- a/json/src/test/java/net/java/html/json/ModelTest.java
+++ b/json/src/test/java/net/java/html/json/ModelTest.java
@@ -471,8 +471,9 @@ public <M> M toModel(Class<M> modelClass, Object data) {
         }
 
         @Override
+        @Deprecated
         public void runSafe(Runnable r) {
-            throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+            throw new UnsupportedOperationException("Not supported yet.");
         }
     }
 }
diff --git a/json/src/test/java/org/netbeans/html/json/impl/DeepChangeTest.java b/json/src/test/java/org/netbeans/html/json/impl/DeepChangeTest.java
index ed3f3c2ab..1c91f5136 100644
--- a/json/src/test/java/org/netbeans/html/json/impl/DeepChangeTest.java
+++ b/json/src/test/java/org/netbeans/html/json/impl/DeepChangeTest.java
@@ -637,26 +637,32 @@ public Object toJSON(InputStream is) throws IOException {
         }
 
         @Override
+        @Deprecated
         public void runSafe(Runnable r) {
-            throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+            throw new UnsupportedOperationException("Not supported yet.");
         }
     }
 
-    private static void assertGC(Reference<?> ref, String msg) throws InterruptedException {
+    static void assertGC(Reference<?> ref, String msg) throws InterruptedException {
         for (int i = 0; i < 100; i++) {
             if (isGone(ref)) {
                 return;
             }
-            try {
-                System.gc();
-                System.runFinalization();
-            } catch (Error err) {
-                err.printStackTrace();
-            }
+            forceGC();
         }
         throw new InterruptedException(msg);
     }
 
+    @SuppressWarnings("deprecation")
+    private static void forceGC() {
+        try {
+            System.gc();
+            System.runFinalization();
+        } catch (Error err) {
+            err.printStackTrace();
+        }
+    }
+
     private static boolean isGone(Reference<?> ref) {
         return ref.get() == null;
     }
diff --git a/json/src/test/java/org/netbeans/html/json/impl/DependsChangeTest.java b/json/src/test/java/org/netbeans/html/json/impl/DependsChangeTest.java
index 3102e08d3..47e3fa660 100644
--- a/json/src/test/java/org/netbeans/html/json/impl/DependsChangeTest.java
+++ b/json/src/test/java/org/netbeans/html/json/impl/DependsChangeTest.java
@@ -79,7 +79,7 @@ public void disappearModel() throws Exception {
 
         Reference<Object> ref = new WeakReference<Object>(p);
         p = null;
-        assertGC(ref, "MyOverall can now disappear");
+        DeepChangeTest.assertGC(ref, "MyOverall can now disappear");
         assertNotNull(refStrong, "Submodel still used");
     }
 
@@ -211,28 +211,9 @@ public Object toJSON(InputStream is) throws IOException {
         }
 
         @Override
+        @Deprecated
         public void runSafe(Runnable r) {
-            throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+            throw new UnsupportedOperationException("Not supported yet.");
         }
     }
-
-    private static void assertGC(Reference<?> ref, String msg) throws InterruptedException {
-        for (int i = 0; i < 100; i++) {
-            if (isGone(ref)) {
-                return;
-            }
-            try {
-                System.gc();
-                System.runFinalization();
-            } catch (Error err) {
-                err.printStackTrace();
-            }
-        }
-        throw new InterruptedException(msg);
-    }
-
-    private static boolean isGone(Reference<?> ref) {
-        return ref.get() == null;
-    }
-
 }
diff --git a/json/src/test/java/org/netbeans/html/json/impl/JSONListTest.java b/json/src/test/java/org/netbeans/html/json/impl/JSONListTest.java
index 580ded140..3f088613b 100644
--- a/json/src/test/java/org/netbeans/html/json/impl/JSONListTest.java
+++ b/json/src/test/java/org/netbeans/html/json/impl/JSONListTest.java
@@ -157,7 +157,7 @@ public JSONListTest() {
         List<Integer> vals = new ArrayList<Integer>();
         vals.add(12);
         vals.add(30);
-        ((JSONList)p.getAge()).fastReplace(vals);
+        ((JSONList<Integer>)p.getAge()).fastReplace(vals);
 
         assertEquals(changed.size(), 1, "One change");
         assertEquals(changed.get(0), "age", "One change");
@@ -206,7 +206,8 @@ public <M> M toModel(Class<M> modelClass, Object data) {
     }
 
     @Override
+    @Deprecated
     public void runSafe(Runnable r) {
-        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+        throw new UnsupportedOperationException("Not supported yet.");
     }
 }
diff --git a/json/src/test/java/org/netbeans/html/json/spi/ProtoTest.java b/json/src/test/java/org/netbeans/html/json/spi/ProtoTest.java
index 89ed6abc3..4e6427aaa 100644
--- a/json/src/test/java/org/netbeans/html/json/spi/ProtoTest.java
+++ b/json/src/test/java/org/netbeans/html/json/spi/ProtoTest.java
@@ -83,6 +83,7 @@ public Object wrapArray(Object[] arr) {
     }
 
     @Override
+    @Deprecated
     public void runSafe(Runnable r) {
         throw new UnsupportedOperationException("runSafe");
     }
diff --git a/ko-felix-test/src/main/java/org/netbeans/html/ko/felix/test/KnockoutFelixTCKImpl.java b/ko-felix-test/src/main/java/org/netbeans/html/ko/felix/test/KnockoutFelixTCKImpl.java
index e786df0e0..c1f4b84d0 100644
--- a/ko-felix-test/src/main/java/org/netbeans/html/ko/felix/test/KnockoutFelixTCKImpl.java
+++ b/ko-felix-test/src/main/java/org/netbeans/html/ko/felix/test/KnockoutFelixTCKImpl.java
@@ -158,7 +158,7 @@ public Object createJSON(Map<String, Object> values) {
         + "var f = new Function(s); "
         + "return f.apply(null, args);"
     )
-    public native Object executeScript(String script, Object[] arguments);
+    public native Object executeScript(String s, Object[] args);
 
     @JavaScriptBody(args = {  }, body = 
           """
@@ -170,7 +170,7 @@ public Object createJSON(Map<String, Object> values) {
     private static native String findBaseURL();
     
     @Override
-    public URI prepareURL(String content, String mimeType, String[] parameters) {
+    public String prepareWebResource(String content, String mimeType, String[] parameters) {
         try {
             final URL baseURL = new URL(findBaseURL());
             StringBuilder sb = new StringBuilder();
@@ -186,7 +186,7 @@ public URI prepareURL(String content, String mimeType, String[] parameters) {
             URLConnection c = query.openConnection();
             BufferedReader br = new BufferedReader(new InputStreamReader(c.getInputStream()));
             URI connectTo = new URI(br.readLine());
-            return connectTo;
+            return connectTo.toString();
         } catch (IOException ex) {
             throw new IllegalStateException(ex);
         } catch (URISyntaxException ex) {
diff --git a/ko-felix-test/src/test/java/org/netbeans/html/ko/felix/test/KOFx.java b/ko-felix-test/src/test/java/org/netbeans/html/ko/felix/test/KOFx.java
index b2cc3f24c..9c3abd5b5 100644
--- a/ko-felix-test/src/test/java/org/netbeans/html/ko/felix/test/KOFx.java
+++ b/ko-felix-test/src/test/java/org/netbeans/html/ko/felix/test/KOFx.java
@@ -70,7 +70,7 @@ public synchronized void run() {
         try {
             a = (Closeable) itClass.getMethod("activateInOSGi", Object.class).invoke(null, p);
             if (inst == null) {
-                inst = m.getDeclaringClass().newInstance();
+                inst = m.getDeclaringClass().getConstructor().newInstance();
             }
             result = m.invoke(inst);
             if (result == null) {
diff --git a/ko-felix-test/src/test/java/org/netbeans/html/ko/felix/test/KnockoutFelixAriesIT.java b/ko-felix-test/src/test/java/org/netbeans/html/ko/felix/test/KnockoutFelixAriesIT.java
index 0ff5f0ff7..a4c36a1db 100644
--- a/ko-felix-test/src/test/java/org/netbeans/html/ko/felix/test/KnockoutFelixAriesIT.java
+++ b/ko-felix-test/src/test/java/org/netbeans/html/ko/felix/test/KnockoutFelixAriesIT.java
@@ -175,11 +175,12 @@ private static Class<?> loadOSGiClass(Class<?> c) throws Exception {
     private static Class<?> browserClass;
     private static Object browserContext;
 
+    @SuppressWarnings("unchecked")
     @Factory public static Object[] compatibilityTests() throws Exception {
         Class<?> tck = loadOSGiClass(KnockoutTCK.class);
         Class<?> peer = loadOSGiClass(KnockoutFelixTCKImpl.class);
         // initialize the TCK
-        Callable<Class[]> inst = (Callable<Class[]>) peer.newInstance();
+        Callable<Class[]> inst = (Callable<Class[]>) peer.getConstructor().newInstance();
         
         Class[] arr = inst.call();
         for (int i = 0; i < arr.length; i++) {
diff --git a/ko-felix-test/src/test/java/org/netbeans/html/ko/felix/test/KnockoutFelixIT.java b/ko-felix-test/src/test/java/org/netbeans/html/ko/felix/test/KnockoutFelixIT.java
index d99dc03ec..6b9616dbe 100644
--- a/ko-felix-test/src/test/java/org/netbeans/html/ko/felix/test/KnockoutFelixIT.java
+++ b/ko-felix-test/src/test/java/org/netbeans/html/ko/felix/test/KnockoutFelixIT.java
@@ -167,11 +167,12 @@ private static Class<?> loadOSGiClass(Class<?> c) throws Exception {
     private static Class<?> browserClass;
     private static Object browserContext;
     
+    @SuppressWarnings("unchecked")
     @Factory public static Object[] compatibilityTests() throws Exception {
         Class<?> tck = loadOSGiClass(KnockoutTCK.class);
         Class<?> peer = loadOSGiClass(KnockoutFelixTCKImpl.class);
         // initialize the TCK
-        Callable<Class[]> inst = (Callable<Class[]>) peer.newInstance();
+        Callable<Class[]> inst = (Callable<Class[]>) peer.getConstructor().newInstance();
         
         Class[] arr = inst.call();
         for (int i = 0; i < arr.length; i++) {
diff --git a/ko-osgi-test/src/main/java/org/netbeans/html/ko/osgi/test/KnockoutEquinoxTCKImpl.java b/ko-osgi-test/src/main/java/org/netbeans/html/ko/osgi/test/KnockoutEquinoxTCKImpl.java
index 74f4165fe..401644e45 100644
--- a/ko-osgi-test/src/main/java/org/netbeans/html/ko/osgi/test/KnockoutEquinoxTCKImpl.java
+++ b/ko-osgi-test/src/main/java/org/netbeans/html/ko/osgi/test/KnockoutEquinoxTCKImpl.java
@@ -76,7 +76,7 @@ public Class[] call() throws Exception {
     private static Object presenter;
     public static void start(URI server, BundleContext ctx) throws Exception {
         Class<?> clazz = loadOSGiClass("org.netbeans.html.boot.fx.FXPresenter", ctx);
-        presenter = clazz.newInstance();
+        presenter = clazz.getConstructor().newInstance();
         final BrowserBuilder bb = BrowserBuilder.newBrowser(presenter).loadClass(KnockoutEquinoxTCKImpl.class).
             loadPage(server.toString()).
             invoke("initialized");
@@ -156,7 +156,7 @@ public Object createJSON(Map<String, Object> values) {
         + "var f = new Function(s); "
         + "return f.apply(null, args);"
     )
-    public native Object executeScript(String script, Object[] arguments);
+    public native Object executeScript(String s, Object[] args);
 
     @JavaScriptBody(args = {  }, body = 
           """
@@ -168,7 +168,7 @@ public Object createJSON(Map<String, Object> values) {
     private static native String findBaseURL();
     
     @Override
-    public URI prepareURL(String content, String mimeType, String[] parameters) {
+    public String prepareWebResource(String content, String mimeType, String[] parameters) {
         try {
             final URL baseURL = new URL(findBaseURL());
             StringBuilder sb = new StringBuilder();
@@ -184,7 +184,7 @@ public URI prepareURL(String content, String mimeType, String[] parameters) {
             URLConnection c = query.openConnection();
             BufferedReader br = new BufferedReader(new InputStreamReader(c.getInputStream()));
             URI connectTo = new URI(br.readLine());
-            return connectTo;
+            return connectTo.toString();
         } catch (IOException ex) {
             throw new IllegalStateException(ex);
         } catch (URISyntaxException ex) {
diff --git a/ko-osgi-test/src/test/java/org/netbeans/html/ko/osgi/test/KOFx.java b/ko-osgi-test/src/test/java/org/netbeans/html/ko/osgi/test/KOFx.java
index 2a6daa5fb..b99c4d64b 100644
--- a/ko-osgi-test/src/test/java/org/netbeans/html/ko/osgi/test/KOFx.java
+++ b/ko-osgi-test/src/test/java/org/netbeans/html/ko/osgi/test/KOFx.java
@@ -68,7 +68,7 @@ public synchronized void run() {
         try {
             a = KnockoutEquinoxIT.activateInOSGi(p);
             if (inst == null) {
-                inst = m.getDeclaringClass().newInstance();
+                inst = m.getDeclaringClass().getConstructor().newInstance();
             }
             result = m.invoke(inst);
             if (result == null) {
diff --git a/ko-osgi-test/src/test/java/org/netbeans/html/ko/osgi/test/KnockoutEquinoxIT.java b/ko-osgi-test/src/test/java/org/netbeans/html/ko/osgi/test/KnockoutEquinoxIT.java
index 3fcf05a00..3e54f2a3a 100644
--- a/ko-osgi-test/src/test/java/org/netbeans/html/ko/osgi/test/KnockoutEquinoxIT.java
+++ b/ko-osgi-test/src/test/java/org/netbeans/html/ko/osgi/test/KnockoutEquinoxIT.java
@@ -170,11 +170,12 @@ private static Class<?> loadOSGiClass(Class<?> c) throws Exception {
     private static Class<?> browserClass;
     private static Object browserContext;
 
+    @SuppressWarnings("unchecked")
     @Factory public static Object[] compatibilityTests() throws Exception {
         Class<?> tck = loadOSGiClass(KnockoutTCK.class);
         Class<?> peer = loadOSGiClass(KnockoutEquinoxTCKImpl.class);
         // initialize the TCK
-        Callable<Class[]> inst = (Callable<Class[]>) peer.newInstance();
+        Callable<Class[]> inst = (Callable<Class[]>) peer.getConstructor().newInstance();
 
         Class[] arr = inst.call();
         for (int i = 0; i < arr.length; i++) {
diff --git a/ko-ws-tyrus/src/test/java/org/netbeans/html/wstyrus/TyrusFX.java b/ko-ws-tyrus/src/test/java/org/netbeans/html/wstyrus/TyrusFX.java
index 212fc185c..f2c0ab7e0 100644
--- a/ko-ws-tyrus/src/test/java/org/netbeans/html/wstyrus/TyrusFX.java
+++ b/ko-ws-tyrus/src/test/java/org/netbeans/html/wstyrus/TyrusFX.java
@@ -66,7 +66,7 @@ public synchronized void run() {
         boolean notify = true;
         try (var ctx = Fn.activate(p)) {
             if (inst == null) {
-                inst = m.getDeclaringClass().newInstance();
+                inst = m.getDeclaringClass().getConstructor().newInstance();
             }
             result = m.invoke(inst);
             if (result == null) {
diff --git a/ko-ws-tyrus/src/test/java/org/netbeans/html/wstyrus/TyrusKnockoutTest.java b/ko-ws-tyrus/src/test/java/org/netbeans/html/wstyrus/TyrusKnockoutTest.java
index 95b24dca0..60abea36f 100644
--- a/ko-ws-tyrus/src/test/java/org/netbeans/html/wstyrus/TyrusKnockoutTest.java
+++ b/ko-ws-tyrus/src/test/java/org/netbeans/html/wstyrus/TyrusKnockoutTest.java
@@ -126,7 +126,7 @@ public static void initialized() throws Exception {
     
     @Override
     public BrwsrCtx createContext() {
-        KO4J ko = new KO4J(browserContext);
+        KO4J ko = new KO4J();
         TyrusContext tc = new TyrusContext();
         Contexts.Builder cb = Contexts.newBuilder().
             register(Technology.class, ko.knockout(), 10).
@@ -152,11 +152,11 @@ public Object createJSON(Map<String, Object> values) {
     }
 
     @Override
-    @JavaScriptBody(args = { "s", "args" }, body = ""
-        + "var f = new Function(s); "
+    @JavaScriptBody(args = { "script", "args" }, body = ""
+        + "var f = new Function(script); "
         + "return f.apply(null, args);"
     )
-    public native Object executeScript(String script, Object[] arguments);
+    public native Object executeScript(String script, Object[] args);
 
     @JavaScriptBody(args = {  }, body = 
           """
@@ -168,7 +168,7 @@ public Object createJSON(Map<String, Object> values) {
     private static native String findBaseURL();
     
     @Override
-    public URI prepareURL(String content, String mimeType, String[] parameters) {
+    public String prepareWebResource(String content, String mimeType, String[] parameters) {
         try {
             final URL baseURL = new URL(findBaseURL());
             StringBuilder sb = new StringBuilder();
@@ -184,7 +184,7 @@ public URI prepareURL(String content, String mimeType, String[] parameters) {
             URLConnection c = query.openConnection();
             BufferedReader br = new BufferedReader(new InputStreamReader(c.getInputStream()));
             URI connectTo = new URI(br.readLine());
-            return connectTo;
+            return connectTo.toString();
         } catch (IOException ex) {
             throw new IllegalStateException(ex);
         } catch (URISyntaxException ex) {
diff --git a/ko4j/src/main/java/org/netbeans/html/ko4j/KOTech.java b/ko4j/src/main/java/org/netbeans/html/ko4j/KOTech.java
index 9586c8c78..9caacda20 100644
--- a/ko4j/src/main/java/org/netbeans/html/ko4j/KOTech.java
+++ b/ko4j/src/main/java/org/netbeans/html/ko4j/KOTech.java
@@ -102,7 +102,8 @@ public void applyBindings(String id, Knockout data) {
     public Object wrapArray(Object[] arr) {
         return arr;
     }
-    
+
+    @SuppressWarnings("deprecation")
     @Override
     public void runSafe(final Runnable r) {
         r.run();
diff --git a/ko4j/src/test/java/org/netbeans/html/ko4j/KOFx.java b/ko4j/src/test/java/org/netbeans/html/ko4j/KOFx.java
index c9a6c80ee..13d660cb7 100644
--- a/ko4j/src/test/java/org/netbeans/html/ko4j/KOFx.java
+++ b/ko4j/src/test/java/org/netbeans/html/ko4j/KOFx.java
@@ -69,7 +69,7 @@ public synchronized void run() {
         Closeable a = Fn.activate(p);
         try {
             if (inst == null) {
-                inst = m.getDeclaringClass().newInstance();
+                inst = m.getDeclaringClass().getConstructor().newInstance();
             }
             result = m.invoke(inst);
             if (result == null) {
diff --git a/ko4j/src/test/java/org/netbeans/html/ko4j/KnockoutFXTest.java b/ko4j/src/test/java/org/netbeans/html/ko4j/KnockoutFXTest.java
index dbf282087..818f582ea 100644
--- a/ko4j/src/test/java/org/netbeans/html/ko4j/KnockoutFXTest.java
+++ b/ko4j/src/test/java/org/netbeans/html/ko4j/KnockoutFXTest.java
@@ -182,11 +182,11 @@ public Object createJSON(Map<String, Object> values) {
     private static native void setProperty(Object json, String key, Object value);
 
     @Override
-    @JavaScriptBody(args = { "s", "args" }, body = ""
-        + "var f = new Function(s); "
+    @JavaScriptBody(args = { "script", "args" }, body = ""
+        + "var f = new Function(script); "
         + "return f.apply(null, args);"
     )
-    public native Object executeScript(String script, Object[] arguments);
+    public native Object executeScript(String script, Object[] args);
 
     @JavaScriptBody(args = {  }, body = 
           """
diff --git a/ko4j/src/test/java/org/netbeans/html/ko4j/OffThreadInitializationTest.java b/ko4j/src/test/java/org/netbeans/html/ko4j/OffThreadInitializationTest.java
index 78460262d..c2f3eaede 100644
--- a/ko4j/src/test/java/org/netbeans/html/ko4j/OffThreadInitializationTest.java
+++ b/ko4j/src/test/java/org/netbeans/html/ko4j/OffThreadInitializationTest.java
@@ -126,6 +126,7 @@ public Object wrapArray(Object[] arr) {
             return arr;
         }
 
+        @SuppressWarnings("deprecation")
         @Override
         public void runSafe(Runnable r) {
             r.run();
diff --git a/pom.xml b/pom.xml
index 1f3c30af9..8b19b50f1 100644
--- a/pom.xml
+++ b/pom.xml
@@ -302,6 +302,13 @@ org.netbeans.html.boot.impl:org.netbeans.html.boot.fx:org.netbeans.html.context.
                     <target>1.8</target>
                     <testSource>19</testSource>
                     <testTarget>1.8</testTarget>
+                    <compilerArgs>
+                        <compilerArgument>-Xlint:-options</compilerArgument>
+                        <compilerArgument>-Xlint:unchecked</compilerArgument>
+                    </compilerArgs>
+                    <showDeprecation>true</showDeprecation>
+                    <showWarnings>true</showWarnings>
+                    <failOnWarning>true</failOnWarning>
                 </configuration>
               </plugin>
               <plugin>
diff --git a/renderer/src/main/java/org/netbeans/html/presenters/render/Cocoa.java b/renderer/src/main/java/org/netbeans/html/presenters/render/Cocoa.java
index 297daf585..930087771 100644
--- a/renderer/src/main/java/org/netbeans/html/presenters/render/Cocoa.java
+++ b/renderer/src/main/java/org/netbeans/html/presenters/render/Cocoa.java
@@ -63,6 +63,7 @@ final class Cocoa extends Show implements Callback {
         this(null, null, null, false);
     }
 
+    @SuppressWarnings("deprecation")
     Cocoa(Fn.Presenter p, Runnable onPageLoad, Runnable onContext, boolean hl) {
         this.presenter = p;
         this.onPageLoad = onPageLoad;
@@ -80,6 +81,7 @@ public Pointer jsContext() {
         return jsContext;
     }
 
+    @SuppressWarnings("deprecation")
     @Override
     public void show(URI page) {
         this.page = page.toASCIIString();
@@ -165,7 +167,7 @@ private void process() throws Exception {
     }
 
     public interface ObjC extends Library {
-
+        @SuppressWarnings("deprecation")
         public static ObjC INSTANCE = (ObjC) Native.loadLibrary("objc.A", ObjC.class);
 
         public boolean class_addMethod(Pointer cls, Pointer name, Callback imp, String types);
@@ -389,7 +391,7 @@ public Rct(double x, double y, double width, double height) {
         }
 
         @Override
-        protected List getFieldOrder() {
+        protected List<String> getFieldOrder() {
             return Arrays.asList("x", "y", "width", "height");
         }
     }
diff --git a/renderer/src/main/java/org/netbeans/html/presenters/render/GTK.java b/renderer/src/main/java/org/netbeans/html/presenters/render/GTK.java
index 906f1fc05..ccb13db1e 100644
--- a/renderer/src/main/java/org/netbeans/html/presenters/render/GTK.java
+++ b/renderer/src/main/java/org/netbeans/html/presenters/render/GTK.java
@@ -118,7 +118,7 @@ public static class GRectangle extends Structure {
         public int width, height;
 
         @Override
-        protected List getFieldOrder() {
+        protected List<String> getFieldOrder() {
             return Arrays.asList("x", "y", "width", "height");
         }
     }
@@ -380,6 +380,7 @@ static final class Libs {
             }
         }
 
+        @SuppressWarnings("deprecation")
         static <T> T loadLibrary(Class<T> type, boolean allowObjects, Collection<Throwable> errors) {
             String libName = System.getProperty("com.dukescript.presenters.renderer." + type.getSimpleName());
             if (libName == null) {
diff --git a/renderer/src/main/java/org/netbeans/html/presenters/render/JSC.java b/renderer/src/main/java/org/netbeans/html/presenters/render/JSC.java
index e9752d9c8..085031420 100644
--- a/renderer/src/main/java/org/netbeans/html/presenters/render/JSC.java
+++ b/renderer/src/main/java/org/netbeans/html/presenters/render/JSC.java
@@ -57,7 +57,7 @@ public JSClassDefinition(Callback finalize) {
         }
 
         @Override
-        protected List getFieldOrder() {
+        protected List<String> getFieldOrder() {
             return Arrays.asList(
                 "version", "attributes", "className", "parentClass", 
                 "staticValues", "staticFunctions", "initialize", 
diff --git a/renderer/src/main/java/org/netbeans/html/presenters/render/Show.java b/renderer/src/main/java/org/netbeans/html/presenters/render/Show.java
index d5c5041df..655217938 100644
--- a/renderer/src/main/java/org/netbeans/html/presenters/render/Show.java
+++ b/renderer/src/main/java/org/netbeans/html/presenters/render/Show.java
@@ -79,7 +79,7 @@ private static void showOne(String impl, URI page) throws IOException {
         impl.getClass(); // NPE check
         try {
             Class<?> c = Class.forName(Show.class.getPackage().getName() + '.' + impl);
-            Show show = (Show) c.newInstance();
+            Show show = (Show) c.getConstructor().newInstance();
             show.show(page);
         } catch (ClassNotFoundException ex) {
             LOG.log(Level.INFO, "Trying command line execution of {0}", impl);
diff --git a/sound/src/main/java/net/java/html/sound/AudioClip.java b/sound/src/main/java/net/java/html/sound/AudioClip.java
index 19c03ee15..f16bfa602 100644
--- a/sound/src/main/java/net/java/html/sound/AudioClip.java
+++ b/sound/src/main/java/net/java/html/sound/AudioClip.java
@@ -50,24 +50,24 @@ private AudioClip() {
     public static AudioClip create(String src) {
         src.getClass();
         BrwsrCtx brwsrCtx = BrwsrCtx.findDefault(AudioClip.class);
-        AudioEnvironment brwsrAE = Contexts.find(brwsrCtx, AudioEnvironment.class);
+        AudioEnvironment<?> brwsrAE = Contexts.find(brwsrCtx, AudioEnvironment.class);
         if (brwsrAE != null) {
-            Impl handle = create(brwsrAE, src);
+            Impl<?> handle = create(brwsrAE, src);
             if (handle != null) {
                 return handle;
             }
         }
         for (AudioEnvironment<?> ae : ServiceLoader.load(AudioEnvironment.class)) {
-            Impl handle = create(ae, src);
+            Impl<?> handle = create(ae, src);
             if (handle != null) {
                 return handle;
             }
         }
-        Impl handle = create(BrowserAudioEnv.DEFAULT, src);
+        Impl<?> handle = create(BrowserAudioEnv.DEFAULT, src);
         return handle != null ? handle : DummyClip.INSTANCE;
     }
     
-    /** Plays the clip from begining to the end.
+    /** Plays the clip from beginning to the end.
      */
     public abstract void play();
 
@@ -102,7 +102,7 @@ public static AudioClip create(String src) {
     private static <Audio> Impl<Audio> create(AudioEnvironment<Audio> env, String src) {
         Audio a = env.create(src);
         if (a != null) {
-            return new Impl<Audio>(env, src, a);
+            return new Impl<>(env, src, a);
         } else {
             return null;
         }
diff --git a/webkit/pom.xml b/webkit/pom.xml
index 154946e97..d004303a9 100644
--- a/webkit/pom.xml
+++ b/webkit/pom.xml
@@ -49,6 +49,7 @@
                     <compilerArguments>
                         <Aversion>${project.version}</Aversion>
                     </compilerArguments>
+                    <failOnWarning>false</failOnWarning>
                     <source>20</source>
                     <target>8</target>
                 </configuration>
diff --git a/webkit/src/main/java/org/netbeans/html/presenters/webkit/WebKitPresenter.java b/webkit/src/main/java/org/netbeans/html/presenters/webkit/WebKitPresenter.java
index 774b94b93..c917f0302 100644
--- a/webkit/src/main/java/org/netbeans/html/presenters/webkit/WebKitPresenter.java
+++ b/webkit/src/main/java/org/netbeans/html/presenters/webkit/WebKitPresenter.java
@@ -458,6 +458,7 @@ private final class JSCFn extends Fn {
         private final boolean[] keepAlive;
         
         public JSCFn(Pointer fn, boolean[] keepAlive) {
+            super(WebKitPresenter.this);
             this.fn = fn;
             this.keepAlive = keepAlive;
             protect(this, fn);
diff --git a/webkit/src/test/java/org/netbeans/html/presenters/webkit/Case.java b/webkit/src/test/java/org/netbeans/html/presenters/webkit/Case.java
index 3861a3f1c..2afa6ea68 100644
--- a/webkit/src/test/java/org/netbeans/html/presenters/webkit/Case.java
+++ b/webkit/src/test/java/org/netbeans/html/presenters/webkit/Case.java
@@ -73,7 +73,7 @@ public synchronized void run() {
         boolean notify = true;
         try {
             if (inst == null) {
-                inst = m.getDeclaringClass().newInstance();
+                inst = m.getDeclaringClass().getConstructor().newInstance();
             }
             result = m.invoke(inst);
             if (result == null) {
diff --git a/webkit/src/test/java/org/netbeans/html/presenters/webkit/GtkKnockoutTest.java b/webkit/src/test/java/org/netbeans/html/presenters/webkit/GtkKnockoutTest.java
index bdf851e18..581688224 100644
--- a/webkit/src/test/java/org/netbeans/html/presenters/webkit/GtkKnockoutTest.java
+++ b/webkit/src/test/java/org/netbeans/html/presenters/webkit/GtkKnockoutTest.java
@@ -185,7 +185,7 @@ public Object createJSON(Map<String, Object> values) {
         + "var f = new Function(s); "
         + "return f.apply(null, args);"
     )
-    public native Object executeScript(String script, Object[] arguments);
+    public native Object executeScript(String s, Object[] args);
 
     @JavaScriptBody(args = {  }, body = 
           """
@@ -201,7 +201,7 @@ public Object createJSON(Map<String, Object> values) {
     private static native String findBaseURL();
 
     @Override
-    public URI prepareURL(String content, String mimeType, String[] parameters) {
+    public String prepareWebResource(String content, String mimeType, String[] parameters) {
         try {
             final URL baseURL = new URL(findBaseURL());
             StringBuilder sb = new StringBuilder();
@@ -217,7 +217,7 @@ public URI prepareURL(String content, String mimeType, String[] parameters) {
             URLConnection c = query.openConnection();
             BufferedReader br = new BufferedReader(new InputStreamReader(c.getInputStream()));
             URI connectTo = new URI(br.readLine());
-            return connectTo;
+            return connectTo.toString();
         } catch (IOException ex) {
             throw new IllegalStateException(ex);
         } catch (URISyntaxException ex) {
diff --git a/xhr4j/src/test/java/org/netbeans/html/xhr4j/JsonFX.java b/xhr4j/src/test/java/org/netbeans/html/xhr4j/JsonFX.java
index 5d2b5dddf..784032a20 100644
--- a/xhr4j/src/test/java/org/netbeans/html/xhr4j/JsonFX.java
+++ b/xhr4j/src/test/java/org/netbeans/html/xhr4j/JsonFX.java
@@ -66,7 +66,7 @@ public synchronized void run() {
         boolean notify = true;
         try (var ctx = Fn.activate(p)) {
             if (inst == null) {
-                inst = m.getDeclaringClass().newInstance();
+                inst = m.getDeclaringClass().getConstructor().newInstance();
             }
             result = m.invoke(inst);
             if (result == null) {
diff --git a/xhr4j/src/test/java/org/netbeans/html/xhr4j/JsonKnockoutTest.java b/xhr4j/src/test/java/org/netbeans/html/xhr4j/JsonKnockoutTest.java
index e5ef259d4..73a2365fe 100644
--- a/xhr4j/src/test/java/org/netbeans/html/xhr4j/JsonKnockoutTest.java
+++ b/xhr4j/src/test/java/org/netbeans/html/xhr4j/JsonKnockoutTest.java
@@ -125,7 +125,7 @@ public boolean canFailWebSocketTest() {
     
     @Override
     public BrwsrCtx createContext() {
-        KO4J ko = new KO4J(browserContext);
+        KO4J ko = new KO4J();
         XmlHttpResourceContext tc = new XmlHttpResourceContext();
         Contexts.Builder cb = Contexts.newBuilder().
             register(Technology.class, ko.knockout(), 10).
@@ -155,7 +155,7 @@ public Object createJSON(Map<String, Object> values) {
         + "var f = new Function(s); "
         + "return f.apply(null, args);"
     )
-    public native Object executeScript(String script, Object[] arguments);
+    public native Object executeScript(String s, Object[] args);
 
     @JavaScriptBody(args = {  }, body = 
           """
@@ -167,7 +167,7 @@ public Object createJSON(Map<String, Object> values) {
     private static native String findBaseURL();
     
     @Override
-    public URI prepareURL(String content, String mimeType, String[] parameters) {
+    public String prepareWebResource(String content, String mimeType, String[] parameters) {
         try {
             final URL baseURL = new URL(findBaseURL());
             StringBuilder sb = new StringBuilder();
@@ -183,7 +183,7 @@ public URI prepareURL(String content, String mimeType, String[] parameters) {
             URLConnection c = query.openConnection();
             BufferedReader br = new BufferedReader(new InputStreamReader(c.getInputStream()));
             URI connectTo = new URI(br.readLine());
-            return connectTo;
+            return connectTo.toString();
         } catch (IOException ex) {
             throw new IllegalStateException(ex);
         } catch (URISyntaxException ex) {