diff --git a/java/javanote/java-basic-study/pom.xml b/java/javanote/java-basic-study/pom.xml
index 575f069..9f3d3df 100644
--- a/java/javanote/java-basic-study/pom.xml
+++ b/java/javanote/java-basic-study/pom.xml
@@ -40,7 +40,7 @@
         <dependency>
             <groupId>io.netty</groupId>
             <artifactId>netty-codec</artifactId>
-            <version>4.1.50.Final</version>
+            <version>4.1.68.Final</version>
         </dependency>
         <dependency>
             <groupId>org.jboss.netty</groupId>