diff --git a/pkgs/os-specific/linux/jool/source.nix b/pkgs/os-specific/linux/jool/source.nix
index 9e8de46edba7..abf7b0dac45f 100644
--- a/pkgs/os-specific/linux/jool/source.nix
+++ b/pkgs/os-specific/linux/jool/source.nix
@@ -1,11 +1,11 @@
 { fetchFromGitHub }:
 
 rec {
-  version = "4.0.5";
+  version = "4.0.9";
   src = fetchFromGitHub {
     owner = "NICMx";
     repo = "Jool";
     rev = "v${version}";
-    sha256 = "0zfda8mbcg4mgg39shxdx5n2bq6zi9w3v8bcx03b3dp09lmq45y3";
+    sha256 = "0zhdpk1sbsv1iyr9rvj94wk853684avz3zzn4cv2k4254d7n25m7";
   };
 }