diff --git a/src/main/java/com/github/ddth/recipes/apiservice/grpc/pom.xml b/src/main/java/com/github/ddth/recipes/apiservice/grpc/pom.xml
index a7bc75f..f7ee531 100644
--- a/src/main/java/com/github/ddth/recipes/apiservice/grpc/pom.xml
+++ b/src/main/java/com/github/ddth/recipes/apiservice/grpc/pom.xml
@@ -16,7 +16,7 @@
         <java.version>11</java.version>
 
         <version.grpc>1.22.1</version.grpc>
-        <version.protobuf>3.9.1</version.protobuf>
+        <version.protobuf>3.16.3</version.protobuf>
     </properties>
 
     <dependencies>