diff --git a/pkgs/development/ocaml-modules/mccs/default.nix b/pkgs/development/ocaml-modules/mccs/default.nix
index d939538fa660..ecbac7c2da27 100644
--- a/pkgs/development/ocaml-modules/mccs/default.nix
+++ b/pkgs/development/ocaml-modules/mccs/default.nix
@@ -7,13 +7,13 @@
 
 buildDunePackage rec {
   pname = "mccs";
-  version = "1.1+18";
+  version = "1.1+19";
 
   src = fetchFromGitHub {
     owner = "AltGr";
     repo = "ocaml-mccs";
     rev = version;
-    hash = "sha256-Swfqq7O5KASf1nkK/lgIO9byWDUv1FiWh8cNULF7wfI=";
+    hash = "sha256-xvcqPXyzVGXXFYRVdFPaCfieFEguWffWVB04ImEuPvQ=";
   };
 
   propagatedBuildInputs = [