diff --git a/java/build.gradle b/java/build.gradle
index 6d08f1c..3827538 100644
--- a/java/build.gradle
+++ b/java/build.gradle
@@ -60,7 +60,7 @@ configure(allprojects.findAll {it.name != "light-chat"}) {
     apply plugin: 'kotlin'
     apply plugin: 'java-library'
 
-    ext.netty_ver = "4.1.59.Final"
+    ext.netty_ver = "4.1.63.Final"
     ext.jline_ver = "3.18.0"
     ext.log4j_ver = "2.14.0"