diff --git a/pkgs/development/python-modules/wagtail-factories/default.nix b/pkgs/development/python-modules/wagtail-factories/default.nix
index 1717f38b49a4..03c2c09a2318 100644
--- a/pkgs/development/python-modules/wagtail-factories/default.nix
+++ b/pkgs/development/python-modules/wagtail-factories/default.nix
@@ -9,14 +9,14 @@
 
 buildPythonPackage rec {
   pname = "wagtail-factories";
-  version = "4.1.0";
+  version = "4.2.1";
   format = "setuptools";
 
   src = fetchFromGitHub {
     repo = pname;
     owner = "wagtail";
-    rev = "refs/tags/v${version}";
-    sha256 = "sha256-xNLHJ/8IZt3pzHAzr9swcL6GcIQyIjIFfoeHUW1i76U=";
+    rev = "refs/tags/${version}";
+    sha256 = "sha256-jo8VwrmxHBJnORmuR6eTLrf/eupNL2vhXcw81EzfTxM=";
   };
 
   propagatedBuildInputs = [