googleapis
diff --git a/gax-java/dependencies.properties b/gax-java/dependencies.properties
@@ -23,9 +23,9 @@ version.gax_httpjson=0.113.1-SNAPSHOT
 # Versions for dependencies which actual artifacts differ between Bazel and Gradle.
 # Gradle build depends on prebuilt maven artifacts, while Bazel build depends on Bazel workspaces
 # with the sources.
-version.com_google_protobuf=3.23.1
+version.com_google_protobuf=3.21.12
 version.google_java_format=1.15.0
-version.io_grpc=1.55.1
+version.io_grpc=1.54.0
 
 # Maven artifacts.
 # Note, the actual name of each property matters (bazel build scripts depend on it).

diff --git a/...ic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/AttemptSequenceRequest.java b/...ic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/AttemptSequenceRequest.java
diff --git a/...se-v1beta1/src/main/java/com/google/showcase/v1beta1/AttemptStreamingSequenceRequest.java b/...se-v1beta1/src/main/java/com/google/showcase/v1beta1/AttemptStreamingSequenceRequest.java
diff --git a/...e-v1beta1/src/main/java/com/google/showcase/v1beta1/AttemptStreamingSequenceResponse.java b/...e-v1beta1/src/main/java/com/google/showcase/v1beta1/AttemptStreamingSequenceResponse.java
diff --git a/.../proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/BlockRequest.java b/.../proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/BlockRequest.java
diff --git a/...pic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/BlockRequestOrBuilder.java b/...pic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/BlockRequestOrBuilder.java
diff --git a/...proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/BlockResponse.java b/...proto-gapic-showcase-v1beta1/src/main/java/com/google/showcase/v1beta1/BlockResponse.java