diff --git a/gapic-generator-java-pom-parent/pom.xml b/gapic-generator-java-pom-parent/pom.xml
index 279e57fc00..78828bf17d 100644
--- a/gapic-generator-java-pom-parent/pom.xml
+++ b/gapic-generator-java-pom-parent/pom.xml
@@ -31,7 +31,7 @@
     <google.http-client.version>1.44.1</google.http-client.version>
     <gson.version>2.10.1</gson.version>
     <guava.version>33.1.0-jre</guava.version>
-    <protobuf.version>3.25.2</protobuf.version>
+    <protobuf.version>3.25.3</protobuf.version>
     <opentelemetry.version>1.36.0</opentelemetry.version>
     <maven.compiler.release>8</maven.compiler.release>
     <errorprone.version>2.26.1</errorprone.version>
diff --git a/gax-java/dependencies.properties b/gax-java/dependencies.properties
index 0b199b26a5..287a089252 100644
--- a/gax-java/dependencies.properties
+++ b/gax-java/dependencies.properties
@@ -26,7 +26,7 @@ version.gax_httpjson=2.46.2-SNAPSHOT
 # The protobuf version is only used for generating gradle files for showcase module,
 # not for self-service clients (from googleapis project).
 
-version.com_google_protobuf=3.25.2
+version.com_google_protobuf=3.25.3
 version.google_java_format=1.15.0
 version.io_grpc=1.62.2