diff --git a/bucket/zookeeper.json b/bucket/zookeeper.json
index 980e71880c..f8822a4575 100644
--- a/bucket/zookeeper.json
+++ b/bucket/zookeeper.json
@@ -1,11 +1,11 @@
 {
     "homepage": "https://zookeeper.apache.org/",
     "description": "High-performance coordination service for distributed applications",
-    "version": "3.5.5",
+    "version": "3.5.6",
     "license": "Apache-2.0",
-    "url": "https://www.apache.org/dist/zookeeper/zookeeper-3.5.5/apache-zookeeper-3.5.5-bin.tar.gz",
-    "hash": "sha512:4c65e56c074393835dee87256d577ebef6bbc0fbe8271cf030a50779f7e9ba5110bc274aa4b239a431de1716ad6c8a103abac02b93c3ad2c264bbea8b1c330c1",
-    "extract_dir": "apache-zookeeper-3.5.5-bin",
+    "url": "https://www.apache.org/dist/zookeeper/zookeeper-3.5.6/apache-zookeeper-3.5.6-bin.tar.gz",
+    "hash": "sha512:2bbd0c3a1de0a7d466d0c2c7dce47730bf20002381e2032b87b216bddb41b659d16920c587d4769d45d2ad12230b0fef6adad7fddbfef275bbb547d7bca2c78d",
+    "extract_dir": "apache-zookeeper-3.5.6-bin",
     "bin": [
         "bin\\zkServer.cmd",
         "bin\\zkCli.cmd"