diff --git a/gson-master/proto/pom.xml b/gson-master/proto/pom.xml
index 11b999d..10d4a19 100644
--- a/gson-master/proto/pom.xml
+++ b/gson-master/proto/pom.xml
@@ -62,7 +62,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java</artifactId>
-      <version>2.6.1</version>
+      <version>3.16.3</version>
       <scope>compile</scope>
     </dependency>