diff --git a/protobufdemo/pom.xml b/protobufdemo/pom.xml
index e752cea..9bc3a2b 100644
--- a/protobufdemo/pom.xml
+++ b/protobufdemo/pom.xml
@@ -27,7 +27,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java</artifactId>
-      <version>2.6.1</version>
+      <version>3.16.1</version>
     </dependency>
   </dependencies>
 </project>