diff --git a/google-cloud-pubsub/pom.xml b/google-cloud-pubsub/pom.xml
index af2d034e5..77fb437c7 100644
--- a/google-cloud-pubsub/pom.xml
+++ b/google-cloud-pubsub/pom.xml
@@ -37,6 +37,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java</artifactId>
+<!--      <version>4.27.4</version>-->
     </dependency>
     <dependency>
       <groupId>com.google.api.grpc</groupId>
diff --git a/grpc-google-cloud-pubsub-v1/pom.xml b/grpc-google-cloud-pubsub-v1/pom.xml
index 9b5e7af10..e24059c9b 100644
--- a/grpc-google-cloud-pubsub-v1/pom.xml
+++ b/grpc-google-cloud-pubsub-v1/pom.xml
@@ -28,6 +28,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java</artifactId>
+<!--      <version>4.27.4</version>-->
     </dependency>
     <dependency>
       <groupId>com.google.api.grpc</groupId>
diff --git a/proto-google-cloud-pubsub-v1/clirr-ignored-differences.xml b/proto-google-cloud-pubsub-v1/clirr-ignored-differences.xml
index 909185fc4..bfec627ae 100644
--- a/proto-google-cloud-pubsub-v1/clirr-ignored-differences.xml
+++ b/proto-google-cloud-pubsub-v1/clirr-ignored-differences.xml
@@ -79,7 +79,7 @@
   <difference>
     <differenceType>7006</differenceType>
     <className>com/google/pubsub/v1/**</className>
-    <method>* setUnknownField(*)</method>
+    <method>* setUnknownFields(*)</method>
     <to>**</to>
   </difference>
 </differences>
diff --git a/proto-google-cloud-pubsub-v1/pom.xml b/proto-google-cloud-pubsub-v1/pom.xml
index 4d6605394..6ab83912b 100644
--- a/proto-google-cloud-pubsub-v1/pom.xml
+++ b/proto-google-cloud-pubsub-v1/pom.xml
@@ -16,6 +16,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java</artifactId>
+<!--      <version>4.27.4</version>-->
     </dependency>
     <dependency>
       <groupId>com.google.api.grpc</groupId>