diff --git a/pkgs/development/python-modules/pysdf/default.nix b/pkgs/development/python-modules/pysdf/default.nix
index adbda23..5aa5ca2 100644
--- a/pkgs/development/python-modules/pysdf/default.nix
+++ b/pkgs/development/python-modules/pysdf/default.nix
@@ -4,10 +4,10 @@ buildPythonPackage {
   pname = "pysdf";
   version = "0.4";
   src = fetchFromGitHub {
-    owner = "movefasta";
+    owner = "FirefoxMetzger";
     repo = "python-sdformat";
-    rev = "edfa3bdb97598c11d83bd5d9473db12ef645a478";
-    sha256 = "sha256-4IuljqprFK15B356Iuibz1pphvQWkrtvLsqTntuTB/o=";
+    rev = "51cd5fcb970076f0b64b76938f7923000c8df404";
+    sha256 = "sha256-f30rfdvqxB6HE6hDJbthSv679JO6muAHhhVVes/AK3k=";
   };
   propagatedBuildInputs = with python3Packages; [ poetry-core lxml numpy pytest black ];
 }