diff --git a/pkgs/development/python-modules/atsim_potentials/default.nix b/pkgs/development/python-modules/atsim_potentials/default.nix
index d77dbfa4aae2..9b6f9cf26ac5 100644
--- a/pkgs/development/python-modules/atsim_potentials/default.nix
+++ b/pkgs/development/python-modules/atsim_potentials/default.nix
@@ -14,14 +14,14 @@
 }:
 
 buildPythonPackage rec {
-  version = "0.4.0";
+  version = "0.4.1";
   pname = "atsim-potentials";
 
   src = fetchFromGitHub {
     owner = "mjdrushton";
     repo = pname;
-    rev = version;
-    sha256 = "sha256-MwjRVd54qa8uJOi9yRXU+Vrve50ndftJUl+TFZKVzQM=";
+    rev = "refs/tags/${version}";
+    sha256 = "sha256-G7lNqwEUwAT0f7M2nUTCxpXOAl6FWKlh7tcsvbur1eM=";
   };
 
   postPatch = ''