diff --git a/gapic-generator-java-pom-parent/pom.xml b/gapic-generator-java-pom-parent/pom.xml
index 094841be5f..4cdfad86d8 100644
--- a/gapic-generator-java-pom-parent/pom.xml
+++ b/gapic-generator-java-pom-parent/pom.xml
@@ -32,7 +32,7 @@
     <google.http-client.version>1.43.3</google.http-client.version>
     <gson.version>2.10.1</gson.version>
     <guava.version>32.1.2-jre</guava.version>
-    <protobuf.version>3.24.0</protobuf.version>
+    <protobuf.version>3.24.3</protobuf.version>
     <maven.compiler.release>8</maven.compiler.release>
   </properties>
 
diff --git a/gax-java/dependencies.properties b/gax-java/dependencies.properties
index 7e559c3941..a0691ada3c 100644
--- a/gax-java/dependencies.properties
+++ b/gax-java/dependencies.properties
@@ -29,7 +29,7 @@ version.gax_httpjson=2.33.1-SNAPSHOT
 # On next protobuf upgrade (to 3.23.3 or higher),
 # remove temporarily j2objc-annotations exclusions from protobuf-java-util dependencies.
 # For context: https://github.com/googleapis/sdk-platform-java/pull/1791
-version.com_google_protobuf=3.24.0
+version.com_google_protobuf=3.24.3
 version.google_java_format=1.15.0
 version.io_grpc=1.58.0