diff --git a/pkgs/development/python-modules/millheater/default.nix b/pkgs/development/python-modules/millheater/default.nix
index 3f372790702a..a63e3751996c 100644
--- a/pkgs/development/python-modules/millheater/default.nix
+++ b/pkgs/development/python-modules/millheater/default.nix
@@ -9,7 +9,7 @@
 
 buildPythonPackage rec {
   pname = "millheater";
-  version = "0.11.8";
+  version = "0.12.0";
   format = "setuptools";
 
   disabled = pythonOlder "3.10";
@@ -18,7 +18,7 @@ buildPythonPackage rec {
     owner = "Danielhiversen";
     repo = "pymill";
     rev = "refs/tags/${version}";
-    hash = "sha256-BSrnUhe6SFtalUGldC24eJTqJAF5FdUWo3rwWNT1uCw=";
+    hash = "sha256-8PrTypJuWNuFz1NZLuyqOpWFsN5OLshj7S10YgcGusQ=";
   };
 
   propagatedBuildInputs = [