diff --git a/pkgs/by-name/gb/gbforth/package.nix b/pkgs/by-name/gb/gbforth/package.nix
index 0d0f42616725..924068150f2d 100644
--- a/pkgs/by-name/gb/gbforth/package.nix
+++ b/pkgs/by-name/gb/gbforth/package.nix
@@ -4,17 +4,18 @@
   fetchFromGitHub,
   makeWrapper,
   gforth,
+  unstableGitUpdater,
 }:
 
 stdenv.mkDerivation {
   pname = "gbforth";
-  version = "unstable-2023-03-02";
+  version = "unstable-2025-10-08";
 
   src = fetchFromGitHub {
     owner = "ams-hackers";
     repo = "gbforth";
-    rev = "428fcf5054fe301e90ac74b1d920ee3ecc375b5b";
-    hash = "sha256-v1bdwT15Wg1VKpo74Cc3tsTl1uOKvKdlHWtbZkJ/qbA=";
+    rev = "39ec80520bf7bedf881eca01909cc9eeb7334a60";
+    hash = "sha256-3Zky+ZKA0FPhO1l5pFdmDQgdwvvO3QgPGsgVracY5xw=";
   };
 
   nativeBuildInputs = [
@@ -40,6 +41,8 @@ stdenv.mkDerivation {
     runHook postInstallCheck
   '';
 
+  passthru.updateScript = unstableGitUpdater { };
+
   meta = with lib; {
     homepage = "https://gbforth.org/";
     description = "Forth-based Game Boy development kit";