diff --git a/build.gradle b/build.gradle
index 8d9b45507..7cf311211 100644
--- a/build.gradle
+++ b/build.gradle
@@ -24,7 +24,7 @@ allprojects {
         junitVersion = '5.3.0-M1'
         slf4jVersion = '1.7.25'
         log4jVersion = '2.11.2'
-        nettyVersion = '4.1.38.Final'
+        nettyVersion = '4.1.42.Final'
         guavaVersion = '25.1-jre'
         checkerFrameworkVersion = '2.7.0'
         configurateVersion = '3.6'