diff --git a/build.xml b/build.xml
index 2e214e3f8c..3c5afc6675 100644
--- a/build.xml
+++ b/build.xml
@@ -378,7 +378,7 @@
           <dependency groupId="com.addthis.metrics" artifactId="reporter-config" version="2.1.0" />
           <dependency groupId="org.mindrot" artifactId="jbcrypt" version="0.3m" />
           <dependency groupId="io.airlift" artifactId="airline" version="0.6" />
-          <dependency groupId="io.netty" artifactId="netty-all" version="4.0.19.Final" />
+          <dependency groupId="io.netty" artifactId="netty-all" version="4.0.20.Final" />
           <dependency groupId="com.google.code.findbugs" artifactId="jsr305" version="2.0.2" />
           <dependency groupId="com.clearspring.analytics" artifactId="stream" version="2.5.2" />
           <dependency groupId="com.datastax.cassandra" artifactId="cassandra-driver-core" version="2.0.1" />
diff --git a/lib/licenses/netty-all-4.0.19.Final.txt b/lib/licenses/netty-all-4.0.20.Final.txt
similarity index 100%
rename from lib/licenses/netty-all-4.0.19.Final.txt
rename to lib/licenses/netty-all-4.0.20.Final.txt
diff --git a/lib/netty-all-4.0.19.Final.jar b/lib/netty-all-4.0.20.Final.jar
similarity index 71%
rename from lib/netty-all-4.0.19.Final.jar
rename to lib/netty-all-4.0.20.Final.jar
index 66d58f3ffe..0d70c6659a 100644
Binary files a/lib/netty-all-4.0.19.Final.jar and b/lib/netty-all-4.0.20.Final.jar differ