diff --git a/pkgs/development/python-modules/gftools/default.nix b/pkgs/development/python-modules/gftools/default.nix
index f01aaf79f88f..e4018e6308ca 100644
--- a/pkgs/development/python-modules/gftools/default.nix
+++ b/pkgs/development/python-modules/gftools/default.nix
@@ -62,14 +62,14 @@ let
 in
 buildPythonPackage rec {
   pname = "gftools";
-  version = "0.9.99";
+  version = "0.9.991";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "googlefonts";
     repo = "gftools";
     tag = "v${version}";
-    hash = "sha256-40pUW18DP2oqPwQJZ38ZvBv9AKgw54eTRq77dVcwqbM=";
+    hash = "sha256-EZaCuKQXf4E8hARFZz2MZEKtrUUvD7EGzGx/mEJnfZ4=";
   };
 
   postPatch = ''