diff --git a/pkgs/development/python-modules/intbitset/default.nix b/pkgs/development/python-modules/intbitset/default.nix
index 4c3d1d477c5a6..3e275c3c13082 100644
--- a/pkgs/development/python-modules/intbitset/default.nix
+++ b/pkgs/development/python-modules/intbitset/default.nix
@@ -9,14 +9,14 @@
 
 buildPythonPackage rec {
   pname = "intbitset";
-  version = "3.1.0";
+  version = "4.0.0";
   pyproject = true;
 
   disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-boPFun/aJSCqhWVCi7r4Qt63KT1mXzzYKByzklTS/3E=";
+    hash = "sha256-wUHtqhwXuRwph1N+Jp2VWra9w5Zq89624eDSDtvQndI=";
   };
 
   build-system = [ setuptools ];