diff --git a/grpc/grpc-impl/pom.xml b/grpc/grpc-impl/pom.xml
index 01fbb85..523e200 100644
--- a/grpc/grpc-impl/pom.xml
+++ b/grpc/grpc-impl/pom.xml
@@ -66,7 +66,7 @@ and is available at http://www.eclipse.org/legal/epl-v10.html
       <dependency>
           <groupId>com.google.protobuf</groupId>
           <artifactId>protobuf-java</artifactId>
-          <version>3.6.1</version>
+          <version>3.16.3</version>
       </dependency>
       <dependency>
           <groupId>io.grpc</groupId>