diff --git a/pom.xml b/pom.xml
index dc8cca7c65..26c312dda6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -116,7 +116,7 @@
       <netty.version>4.1.106.Final</netty.version>
       <hdrhistogram.version>2.1.12</hdrhistogram.version>
       <curator.version>5.6.0</curator.version>
-      <zookeeper.version>3.8.3</zookeeper.version>
+      <zookeeper.version>3.9.1</zookeeper.version>
       <woodstox.version>4.4.0</woodstox.version>
       <pem-keystore.version>2.3.0</pem-keystore.version>
       <!-- This overrides the Apache parent POM due to https://issues.apache.org/jira/browse/MSHADE-462. Once that issue