diff --git a/pkgs/development/python-modules/django-modelcluster/default.nix b/pkgs/development/python-modules/django-modelcluster/default.nix
index ed4f3a05a764..608c78f8cff4 100644
--- a/pkgs/development/python-modules/django-modelcluster/default.nix
+++ b/pkgs/development/python-modules/django-modelcluster/default.nix
@@ -13,16 +13,16 @@
 
 buildPythonPackage rec {
   pname = "django-modelcluster";
-  version = "6.3";
+  version = "6.4";
   pyproject = true;
 
-  disabled = pythonOlder "3.8";
+  disabled = pythonOlder "3.9";
 
   src = fetchFromGitHub {
     owner = "wagtail";
     repo = "django-modelcluster";
-    rev = "refs/tags/v${version}";
-    hash = "sha256-AUVl2aidjW7Uu//3HlAod7pxzj6Gs1Xd0uTt3NrrqAU=";
+    tag = "v${version}";
+    hash = "sha256-JoDDHvZ9N+7hcIxRsbVrYW8/95iUcNHDQkvtmDVUzws=";
   };
 
   build-system = [ setuptools ];