diff --git a/pkgs/development/python-modules/iminuit/default.nix b/pkgs/development/python-modules/iminuit/default.nix
index 97dec9cf66f3..f210e9f0ab27 100644
--- a/pkgs/development/python-modules/iminuit/default.nix
+++ b/pkgs/development/python-modules/iminuit/default.nix
@@ -9,14 +9,14 @@
 
 buildPythonPackage rec {
   pname = "iminuit";
-  version = "2.20.0";
+  version = "2.21.0";
   format = "setuptools";
 
   disabled = pythonOlder "3.6";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-pz/m4C814xgPwBvFwXlO32Yv8XJcO8Kk9DNWd5nadQQ=";
+    hash = "sha256-ivRsweaIvkiBceTfAI457wN+tbntJ3t4HTynWf29vAI=";
   };
 
   nativeBuildInputs = [