diff --git a/pkgs/development/python-modules/xml2rfc/default.nix b/pkgs/development/python-modules/xml2rfc/default.nix
index be9323c774d8..0612c98c8e7e 100644
--- a/pkgs/development/python-modules/xml2rfc/default.nix
+++ b/pkgs/development/python-modules/xml2rfc/default.nix
@@ -26,15 +26,15 @@
 
 buildPythonPackage rec {
   pname = "xml2rfc";
-  version = "3.12.4";
+  version = "3.13.0";
 
   disabled = pythonOlder "3.6";
 
   src = fetchFromGitHub {
     owner = "ietf-tools";
     repo = "xml2rfc";
-    rev = "v${version}";
-    sha256 = "sha256-TAu2Ls553t7wJ/Jhgu+Ff+H4P6az0Du8OL00JjZyCDs=";
+    rev = "refs/tags/v${version}";
+    sha256 = "sha256-z+OVlqIuLP6D5qvS4VxJFjjLiYKH7pDKqYCrvv9FHJ4=";
   };
 
   postPatch = ''