diff --git a/grpc-google-iam-v1/build.gradle b/grpc-google-iam-v1/build.gradle
index cc95977f..ea8e2fbb 100644
--- a/grpc-google-iam-v1/build.gradle
+++ b/grpc-google-iam-v1/build.gradle
@@ -19,7 +19,7 @@ repositories {
 
 dependencies {
   compile 'io.grpc:grpc-stub:1.43.2'
-  compile 'io.grpc:grpc-protobuf:1.42.1'
+  compile 'io.grpc:grpc-protobuf:1.43.2'
   compile project(':proto-google-iam-v1')
 }