diff --git a/pkgs/games/openttd/jgrpp.nix b/pkgs/games/openttd/jgrpp.nix
index 83a8f927694..7f756dd10b7 100644
--- a/pkgs/games/openttd/jgrpp.nix
+++ b/pkgs/games/openttd/jgrpp.nix
@@ -2,12 +2,12 @@
 
 openttd.overrideAttrs (oldAttrs: rec {
   pname = "openttd-jgrpp";
-  version = "0.34.4";
+  version = "0.40.5";
 
   src = fetchFromGitHub rec {
     owner = "JGRennison";
     repo = "OpenTTD-patches";
     rev = "jgrpp-${version}";
-    sha256 = "125mgia5hgcsn8314xyiip3z8y23rc3kdv7jczbncqlzsc75624v";
+    sha256 = "sha256-g1RmgVjefOrOVLTvFBiPEd19aLoFvB9yX/hMiKgGcGw=";
   };
 })