diff --git a/.cloudbuild/library_generation/library_generation.Dockerfile b/.cloudbuild/library_generation/library_generation.Dockerfile
index f0ec060357..5bc7a4e4c8 100644
--- a/.cloudbuild/library_generation/library_generation.Dockerfile
+++ b/.cloudbuild/library_generation/library_generation.Dockerfile
@@ -38,7 +38,7 @@ FROM docker.io/library/python:3.13.2-slim@sha256:6b3223eb4d93718828223966ad31690
 
 ARG OWLBOT_CLI_COMMITTISH=3a68a9c0de318784b3aefadcc502a6521b3f1bc5
 ARG PROTOC_VERSION=33.2
-ARG GRPC_VERSION=1.76.2
+ARG GRPC_VERSION=1.76.3
 ENV HOME=/home
 ENV OS_ARCHITECTURE="linux-x86_64"
 
diff --git a/.cloudbuild/library_generation/library_generation_airlock.Dockerfile b/.cloudbuild/library_generation/library_generation_airlock.Dockerfile
index 57fe8781c6..a331ee3bad 100644
--- a/.cloudbuild/library_generation/library_generation_airlock.Dockerfile
+++ b/.cloudbuild/library_generation/library_generation_airlock.Dockerfile
@@ -39,7 +39,7 @@ FROM us-docker.pkg.dev/artifact-foundry-prod/docker-3p-trusted/python@sha256:afc
 
 ARG OWLBOT_CLI_COMMITTISH=3a68a9c0de318784b3aefadcc502a6521b3f1bc5
 ARG PROTOC_VERSION=33.2
-ARG GRPC_VERSION=1.76.2
+ARG GRPC_VERSION=1.76.3
 ENV HOME=/home
 ENV OS_ARCHITECTURE="linux-x86_64"
 
diff --git a/gapic-generator-java-pom-parent/pom.xml b/gapic-generator-java-pom-parent/pom.xml
index a66a589c52..09b4e7a37c 100644
--- a/gapic-generator-java-pom-parent/pom.xml
+++ b/gapic-generator-java-pom-parent/pom.xml
@@ -27,7 +27,7 @@
     <!-- External dependencies, especially gRPC and Protobuf version, should be
         consistent across modules in this repository -->
     <javax.annotation-api.version>1.3.2</javax.annotation-api.version>
-    <grpc.version>1.76.2</grpc.version>
+    <grpc.version>1.76.3</grpc.version>
     <google.auth.version>1.42.1</google.auth.version>
     <google.http-client.version>2.1.0</google.http-client.version>
     <gson.version>2.12.1</gson.version>