diff --git a/pom.xml b/pom.xml
index 8b3818557..c6f7c91c3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -30,7 +30,7 @@
     -->
     <guava.jre.version>33.4.3-jre</guava.jre.version>
     <gwt.version>2.11.0</gwt.version>
-    <protobuf.version>4.33.4</protobuf.version>
+    <protobuf.version>4.33.5</protobuf.version>
     <!-- Property for protobuf-lite protocArtifact, which isn't a "normal" Maven dep. -->
     <!-- TODO(cpovirk): Use protobuf.version instead. But that requires finding the new way to request the Lite runtime. -->
     <protobuf-lite.protoc.version>3.1.0</protobuf-lite.protoc.version>
@@ -307,7 +307,7 @@
         </plugin>
         <plugin>
           <artifactId>maven-compiler-plugin</artifactId>
-          <version>3.14.1</version>
+          <version>3.15.0</version>
           <configuration>
             <source>1.8</source>
             <target>1.8</target>