diff --git a/pattern-tutor/pattern-tutor-netty/pom.xml b/pattern-tutor/pattern-tutor-netty/pom.xml
index b811830..a600aec 100644
--- a/pattern-tutor/pattern-tutor-netty/pom.xml
+++ b/pattern-tutor/pattern-tutor-netty/pom.xml
@@ -14,7 +14,7 @@
 		<dependency>
 			<groupId>io.netty</groupId>
 			<artifactId>netty-all</artifactId>
-			<version>4.1.17.Final</version>
+			<version>4.1.42.Final</version>
 		</dependency>
 	</dependencies>
 </project>
\ No newline at end of file