diff --git a/netty-4.1/pom.xml b/netty-4.1/pom.xml
index 7b0accc..9f225b5 100644
--- a/netty-4.1/pom.xml
+++ b/netty-4.1/pom.xml
@@ -414,7 +414,7 @@
       <dependency>
         <groupId>com.google.protobuf</groupId>
         <artifactId>protobuf-java</artifactId>
-        <version>2.6.1</version>
+        <version>3.16.3</version>
       </dependency>
       <dependency>
         <groupId>com.google.protobuf.nano</groupId>