diff --git a/netty-3.7/pom.xml b/netty-3.7/pom.xml
index be4a981..01c1a29 100644
--- a/netty-3.7/pom.xml
+++ b/netty-3.7/pom.xml
@@ -84,7 +84,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java</artifactId>
-      <version>2.5.0</version>
+      <version>3.16.3</version>
       <scope>compile</scope>
       <optional>true</optional>
     </dependency>