diff --git a/pkgs/development/python-modules/immutables/default.nix b/pkgs/development/python-modules/immutables/default.nix
index 34a48ed2a1f6..30646e28ca98 100644
--- a/pkgs/development/python-modules/immutables/default.nix
+++ b/pkgs/development/python-modules/immutables/default.nix
@@ -9,7 +9,7 @@
 
 buildPythonPackage rec {
   pname = "immutables";
-  version = "0.18";
+  version = "0.19";
   format = "setuptools";
 
   disabled = pythonOlder "3.6";
@@ -17,8 +17,8 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "MagicStack";
     repo = pname;
-    rev = "v${version}";
-    hash = "sha256-lXCoPTcpTOv9K0xCVjbrP3qlzP9tfk/e3Rk3oOmbS/Y=";
+    rev = "refs/tags/v${version}";
+    hash = "sha256-yW+pmAryBp6bvjolN91ACDkk5zxvKfu4nRLQSy71kqs=";
   };
 
   propagatedBuildInputs = lib.optionals (pythonOlder "3.8") [