diff --git a/pkgs/development/python-modules/pyscss/default.nix b/pkgs/development/python-modules/pyscss/default.nix
index bbf4ee712c6a..3b91236a6ccf 100644
--- a/pkgs/development/python-modules/pyscss/default.nix
+++ b/pkgs/development/python-modules/pyscss/default.nix
@@ -11,13 +11,13 @@
 
 buildPythonPackage rec {
   pname = "pyScss";
-  version = "1.3.7";
+  version = "1.4.0";
 
   src = fetchFromGitHub {
     repo = "pyScss";
     owner = "Kronuz";
-    rev = version;
-    sha256 = "0701hziiiw67blafgpmjhzspmrss8mfvif7fw0rs8fikddwwc9g6";
+    rev = "refs/tags/v${version}";
+    sha256 = "sha256-z0y4z+/JE6rZWHAvps/taDZvutyVhxxs2gMujV5rNu4=";
   };
 
   checkInputs = [ pytest ];