diff --git a/pkgs/servers/zookeeper/default.nix b/pkgs/servers/zookeeper/default.nix
index 6a657cc634f3..780a77c5caaf 100644
--- a/pkgs/servers/zookeeper/default.nix
+++ b/pkgs/servers/zookeeper/default.nix
@@ -2,11 +2,11 @@
 
 stdenv.mkDerivation rec {
   name = "zookeeper-${version}";
-  version = "3.4.12";
+  version = "3.4.13";
 
   src = fetchurl {
     url = "mirror://apache/zookeeper/${name}/${name}.tar.gz";
-    sha256 = "1fcljn2741jw1jvjrk5a0xr8rk69wjwrq522wrc5nmjhj0qzk1n6";
+    sha256 = "0karf13zks3ba2rdmma2lyabvmasc04cjmgxp227f0nj8677kvbw";
   };
 
   buildInputs = [ makeWrapper jre ];