diff --git a/kms/pom.xml b/kms/pom.xml
index 0b29ea51cef..1ba659c8032 100644
--- a/kms/pom.xml
+++ b/kms/pom.xml
@@ -28,6 +28,12 @@
       <version>1.38.1</version>
     </dependency>
 
+    <dependency>
+      <groupId>com.google.protobuf</groupId>
+      <artifactId>protobuf-java-util</artifactId>
+      <version>3.12.2</version>
+    </dependency>
+
     <!-- test dependencies -->
     <dependency>
       <groupId>junit</groupId>