diff --git a/temporal-serviceclient/build.gradle b/temporal-serviceclient/build.gradle
index 047a56d98..065fea336 100644
--- a/temporal-serviceclient/build.gradle
+++ b/temporal-serviceclient/build.gradle
@@ -80,7 +80,7 @@ dependencies {
     api 'io.grpc:grpc-protobuf:1.36.0'
     api 'io.grpc:grpc-stub:1.36.0'
     api 'io.grpc:grpc-core:1.36.0'
-    api group: 'com.google.protobuf', name: 'protobuf-java-util', version: '3.15.2'
+    api group: 'com.google.protobuf', name: 'protobuf-java-util', version: '3.15.6'
     api group: 'com.uber.m3', name: 'tally-core', version: '0.6.1'
     api group: 'org.slf4j', name: 'slf4j-api', version: '1.7.30'
     api 'io.grpc:grpc-netty-shaded:1.36.0'