diff --git a/pkgs/servers/memcached/default.nix b/pkgs/servers/memcached/default.nix
index 037f5f81f523..bc8a39fd4cfa 100644
--- a/pkgs/servers/memcached/default.nix
+++ b/pkgs/servers/memcached/default.nix
@@ -1,12 +1,12 @@
 {lib, stdenv, fetchurl, cyrus_sasl, libevent, nixosTests }:
 
 stdenv.mkDerivation rec {
-  version = "1.6.19";
+  version = "1.6.20";
   pname = "memcached";
 
   src = fetchurl {
     url = "https://memcached.org/files/${pname}-${version}.tar.gz";
-    sha256 = "sha256-L9SLBHFGOYsHOliOl5F9m8kIzlGXhYDY4L7aoSO0xw0=";
+    sha256 = "sha256-j2BPjjoXVjfcHwad5vonORFoUMn4Hjdk8vrJo7J74wc=";
   };
 
   configureFlags = [