diff --git a/pkgs/development/tools/knightos/kcc/default.nix b/pkgs/development/tools/knightos/kcc/default.nix
index 2ec7d7f2020..364d46de56d 100644
--- a/pkgs/development/tools/knightos/kcc/default.nix
+++ b/pkgs/development/tools/knightos/kcc/default.nix
@@ -3,13 +3,13 @@
 stdenv.mkDerivation rec {
   pname = "kcc";
 
-  version = "4.0.0";
+  version = "4.0.4";
 
   src = fetchFromGitHub {
     owner = "KnightOS";
     repo = "kcc";
     rev = version;
-    sha256 = "1cd226nqbxq32mppkljavq1kb74jqfqns9r7fskszr42hbygynk4";
+    sha256 = "13sbpv8ynq8sjackv93jqxymk0bsy76c5fc0v29wz97v53q3izjp";
   };
 
   nativeBuildInputs = [ cmake bison flex ];