diff --git a/pkgs/development/python-modules/xarray-dataclasses/default.nix b/pkgs/development/python-modules/xarray-dataclasses/default.nix
index 09205ea9e1777..9dcbfd001c778 100644
--- a/pkgs/development/python-modules/xarray-dataclasses/default.nix
+++ b/pkgs/development/python-modules/xarray-dataclasses/default.nix
@@ -12,7 +12,7 @@
 
 buildPythonPackage rec {
   pname = "xarray-dataclasses";
-  version = "1.8.0";
+  version = "1.9.1";
   pyproject = true;
 
   disabled = pythonOlder "3.8";
@@ -20,8 +20,8 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "astropenguin";
     repo = "xarray-dataclasses";
-    rev = "refs/tags/v${version}";
-    hash = "sha256-NZBWq1G63yef6h9TjRBfCqPzhaks0Cm7bUCJfIIpmcE=";
+    tag = "v${version}";
+    hash = "sha256-p9xV9Mpk5fsWR8X6VWNaeRi66OqK4QQWA8pwD2aYqOU=";
   };
 
   nativeBuildInputs = [