diff --git a/pkgs/development/python-modules/mt-940/default.nix b/pkgs/development/python-modules/mt-940/default.nix
index b2e5f53119f7..417c5ff7d83a 100644
--- a/pkgs/development/python-modules/mt-940/default.nix
+++ b/pkgs/development/python-modules/mt-940/default.nix
@@ -3,12 +3,12 @@
 }:
 
 buildPythonPackage rec {
-  version = "4.27.0";
+  version = "4.28.0";
   pname = "mt-940";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "sha256-LL4CRioio63gpXrsurVucrkFgQrEh0gZPZ79Y2tk/90=";
+    sha256 = "sha256-ydTOaijDmA2ogIONzRMMoz+5jr99qxWM1zzGGzg7f2Q=";
   };
 
   propagatedBuildInputs = lib.optional (!isPy3k) enum34;