diff --git a/pkgs/development/libraries/kerberos/heimdal.nix b/pkgs/development/libraries/kerberos/heimdal.nix
index ab9a107cd47e..4d9c34d728d1 100644
--- a/pkgs/development/libraries/kerberos/heimdal.nix
+++ b/pkgs/development/libraries/kerberos/heimdal.nix
@@ -48,13 +48,13 @@ assert lib.assertMsg (withOpenLDAPAsHDBModule -> withOpenLDAP) ''
 
 stdenv.mkDerivation {
   pname = "heimdal";
-  version = "7.8.0-unstable-2023-11-29";
+  version = "7.8.0-unstable-2024-09-10";
 
   src = fetchFromGitHub {
     owner = "heimdal";
     repo = "heimdal";
-    rev = "3253c49544eacb33d5ad2f6f919b0696e5aab794";
-    hash = "sha256-uljzQBzXrZCZjcIWfioqHN8YsbUUNy14Vo+A3vZIXzM=";
+    rev = "fd2d434dd375c402d803e6f948cfc6e257d3facc";
+    hash = "sha256-WA3lo3eD05l7zKuKEVxudMmiG7OvjK/calaUzPQ2pWs=";
   };
 
   outputs = [ "out" "dev" "man" "info" ];