diff --git a/pkgs/by-name/mc/mctc-lib/package.nix b/pkgs/by-name/mc/mctc-lib/package.nix
index 9f65bd075fe7..2f85e6912070 100644
--- a/pkgs/by-name/mc/mctc-lib/package.nix
+++ b/pkgs/by-name/mc/mctc-lib/package.nix
@@ -12,13 +12,13 @@
 
 stdenv.mkDerivation rec {
   pname = "mctc-lib";
-  version = "0.4.0";
+  version = "0.4.1";
 
   src = fetchFromGitHub {
     owner = "grimme-lab";
     repo = "mctc-lib";
     rev = "v${version}";
-    hash = "sha256-zR4J9gOKwUIfDZsHMdX/t+mKdTpHKYTZQBYxQMWC8Vk=";
+    hash = "sha256-AMRHvzL6CUPItCs07LLOB6Al3yfs8WgrPKRhuNbXiGw=";
   };
 
   nativeBuildInputs = [