diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 85898169729..4a0fd02df5c 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -15572,13 +15572,13 @@ in {
 
   slixmpp = buildPythonPackage rec {
     name = "slixmpp-${version}";
-    version = "1.2.1";
+    version = "1.2.4.post1";
 
     disabled = pythonOlder "3.4";
 
     src = pkgs.fetchurl {
       url = "mirror://pypi/s/slixmpp/${name}.tar.gz";
-      sha256 = "0fwngxf2pnmpk8vhv4pfxvl1ya3nxr4kc2z6jrh2imynbry3xfj9";
+      sha256 = "0v6430dczai8a2nmznhja2dxl6pxa8c5j20nhc5737bqjg7245jk";
     };
 
     patchPhase = ''