diff --git a/pom.xml b/pom.xml
index a81bd358f..c9c469d91 100644
--- a/pom.xml
+++ b/pom.xml
@@ -14,7 +14,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <github.global.server>github</github.global.server>
-        <netty.version>4.0.44.Final</netty.version>
+        <netty.version>4.1.42.Final</netty.version>
         <slf4j.version>1.7.24</slf4j.version>
         <java.version>1.7</java.version>
     </properties>
@@ -84,7 +84,7 @@
                 <jdk>[,1.8)</jdk>
             </activation>
             <properties>
-                <javadoc.opts />
+                <javadoc.opts/>
             </properties>
         </profile>
 
@@ -177,7 +177,7 @@
         <profile>
             <id>netty-4.1</id>
             <properties>
-                <netty.version>4.1.8.Final</netty.version>
+                <netty.version>4.1.42.Final</netty.version>
             </properties>
         </profile>
     </profiles>
@@ -186,7 +186,7 @@
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
-            <version>20.0</version>
+            <version>24.1.1-android</version>
         </dependency>
 
         <dependency>