diff --git a/temporal-serviceclient/build.gradle b/temporal-serviceclient/build.gradle
index 047a56d98..de115ee32 100644
--- a/temporal-serviceclient/build.gradle
+++ b/temporal-serviceclient/build.gradle
@@ -122,7 +122,7 @@ jar {
 
 protobuf {
     protoc {
-        artifact = 'com.google.protobuf:protoc:3.15.2'
+        artifact = 'com.google.protobuf:protoc:3.15.6'
     }
     plugins {
         grpc {