diff --git a/coding-230-master/coding-230/netty-in-action-2.0-SNAPSHOT/chapter11/pom.xml b/coding-230-master/coding-230/netty-in-action-2.0-SNAPSHOT/chapter11/pom.xml
index fd51c61..1813e2e 100644
--- a/coding-230-master/coding-230/netty-in-action-2.0-SNAPSHOT/chapter11/pom.xml
+++ b/coding-230-master/coding-230/netty-in-action-2.0-SNAPSHOT/chapter11/pom.xml
@@ -12,7 +12,7 @@
     <artifactId>chapter11</artifactId>
     <name>Chapter 11. Provided ChannelHandlers and codecs</name>
     <properties>
-        <protobuf-java.version>2.5.0</protobuf-java.version>
+        <protobuf-java.version>3.16.1</protobuf-java.version>
     </properties>
     <dependencies>
         <dependency>