diff --git a/coding-230-master/coding-230/pom.xml b/coding-230-master/coding-230/pom.xml
index 55129e8..dc8f861 100644
--- a/coding-230-master/coding-230/pom.xml
+++ b/coding-230-master/coding-230/pom.xml
@@ -9,7 +9,7 @@
     <version>1.0-SNAPSHOT</version>
 
     <properties>
-        <netty-all.version>4.1.6.Final</netty-all.version>
+        <netty-all.version>4.1.42.Final</netty-all.version>
         <version>5.0.0.Alpha1</version>
         <!--<netty-all.version>5.0.0.Alpha1</netty-all.version>-->
     </properties>