diff --git a/.cloudbuild/library_generation/library_generation.Dockerfile b/.cloudbuild/library_generation/library_generation.Dockerfile
index bc0762808e..97e8892d6a 100644
--- a/.cloudbuild/library_generation/library_generation.Dockerfile
+++ b/.cloudbuild/library_generation/library_generation.Dockerfile
@@ -34,7 +34,7 @@ SHELL [ "/bin/bash", "-c" ]
 
 ARG OWLBOT_CLI_COMMITTISH=ac84fa5c423a0069bbce3d2d869c9730c8fdf550
 ARG PROTOC_VERSION=25.5
-ARG GRPC_VERSION=1.68.0
+ARG GRPC_VERSION=1.67.1
 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 cb9aecfd4d..a0db9927f0 100644
--- a/gapic-generator-java-pom-parent/pom.xml
+++ b/gapic-generator-java-pom-parent/pom.xml
@@ -26,7 +26,7 @@
     <!-- 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>1.68.0</grpc.version>
+    <grpc.version>1.67.1</grpc.version>
     <google.auth.version>1.27.0</google.auth.version>
     <google.http-client.version>1.45.0</google.http-client.version>
     <gson.version>2.11.0</gson.version>