diff --git a/pkgs/by-name/kl/klassy/package.nix b/pkgs/by-name/kl/klassy/package.nix
index 9dd723c02331..8a35056e55c5 100644
--- a/pkgs/by-name/kl/klassy/package.nix
+++ b/pkgs/by-name/kl/klassy/package.nix
@@ -9,13 +9,13 @@
 }:
 stdenv.mkDerivation (finalAttrs: {
   pname = "klassy";
-  version = "6.5";
+  version = "6.5.3";
 
   src = fetchFromGitHub {
     owner = "paulmcauley";
     repo = "klassy";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-zf+RO+GolA9Gnf1/izIG7jCSu8Qlo0d0kRc90llMRIc=";
+    hash = "sha256-2M1SGmYSEnZ1AlsOvhrM25oQi8mz/H8df4pzyFYybN8=";
   };
 
   nativeBuildInputs = [