diff --git a/pkgs/development/python-modules/mwdblib/default.nix b/pkgs/development/python-modules/mwdblib/default.nix
index 96c3f193396..db81e951cf2 100644
--- a/pkgs/development/python-modules/mwdblib/default.nix
+++ b/pkgs/development/python-modules/mwdblib/default.nix
@@ -14,7 +14,7 @@
 
 buildPythonPackage rec {
   pname = "mwdblib";
-  version = "4.1.0";
+  version = "4.2.1";
   format = "setuptools";
 
   disabled = pythonOlder "3.7";
@@ -23,7 +23,7 @@ buildPythonPackage rec {
     owner = "CERT-Polska";
     repo = pname;
     rev = "v${version}";
-    sha256 = "sha256-afqE6zL1uwsLNAuy5XY7OduP1e3W2ueteOOVaFJg3b0=";
+    hash = "sha256-Wkqvi/buYKDoGi+4C9zkxWEiGynk9Ds8gLsdoaZCdKg=";
   };
 
   propagatedBuildInputs = [