diff --git a/j2eelab/pom.xml b/j2eelab/pom.xml
index ce66ff8..2d2d9fe 100644
--- a/j2eelab/pom.xml
+++ b/j2eelab/pom.xml
@@ -226,7 +226,7 @@
         <dependency>
             <groupId>io.netty</groupId>
             <artifactId>netty-all</artifactId>
-            <version>4.1.19.Final</version>
+            <version>4.1.42.Final</version>
         </dependency>