diff --git a/Netty-protobuf/pom.xml b/Netty-protobuf/pom.xml
index 20e9cbb..6f072c7 100644
--- a/Netty-protobuf/pom.xml
+++ b/Netty-protobuf/pom.xml
@@ -15,7 +15,7 @@
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<java.version>1.8</java.version>
 		<netty.version>4.1.22.Final</netty.version>
-		<protobuf.version>3.5.1</protobuf.version>
+		<protobuf.version>3.16.3</protobuf.version>
 		<maven.compiler.source>1.8</maven.compiler.source>
    		<maven.compiler.target>1.8</maven.compiler.target>
 	</properties>