diff --git a/pkgs/tools/graphics/gromit-mpx/default.nix b/pkgs/tools/graphics/gromit-mpx/default.nix
index ebb50cfad2e..2bcaf3c29e1 100644
--- a/pkgs/tools/graphics/gromit-mpx/default.nix
+++ b/pkgs/tools/graphics/gromit-mpx/default.nix
@@ -5,13 +5,13 @@
 
 stdenv.mkDerivation rec {
   pname = "gromit-mpx";
-  version = "1.3";
+  version = "1.3.1";
 
   src = fetchFromGitHub {
     owner = "bk138";
     repo = "gromit-mpx";
     rev = version;
-    sha256 = "1dkmp5rhzp56sz9cfxill2pkdz2anwb8kkxkypvk2xhqi64cvkrs";
+    sha256 = "1dvn7vwg4fg1a3lfj5f7nij1vcxm27gyf2wr817f3qb4sx5xmjwy";
   };
 
   nativeBuildInputs = [ pkgconfig ];