diff --git a/pkgs/by-name/lu/lunatic/package.nix b/pkgs/by-name/lu/lunatic/package.nix
index ac508ee88afc..6127ecba9e7e 100644
--- a/pkgs/by-name/lu/lunatic/package.nix
+++ b/pkgs/by-name/lu/lunatic/package.nix
@@ -6,21 +6,22 @@
   openssl,
   stdenv,
   darwin,
+  unstableGitUpdater,
 }:
 
-rustPlatform.buildRustPackage rec {
+rustPlatform.buildRustPackage {
   pname = "lunatic";
-  version = "0.13.2";
+  version = "0.13.2-unstable-2025-03-29";
 
   src = fetchFromGitHub {
     owner = "lunatic-solutions";
     repo = "lunatic";
-    rev = "v${version}";
-    hash = "sha256-uMMssZaPDZn3bOtQIho+GvUCPmzRllv7eJ+SJuKaYtg=";
+    rev = "28a2f387ebf6a64ce4b87e2638812e2c032d5049";
+    hash = "sha256-FnUYnSWarQf68jBfSlIKVZbQHJt5U93MvA6rbNJE23U=";
   };
 
   useFetchCargoVendor = true;
-  cargoHash = "sha256-SzfM4hQW9vTTRqCAEn/EPv9mK9WlXYRFUW8pA/Gfw04=";
+  cargoHash = "sha256-+2koGrhM9VMLh8uO1YcaugcfmZaCP4S2twKem+y2oks=";
 
   nativeBuildInputs = [
     pkg-config
@@ -39,10 +40,15 @@ rustPlatform.buildRustPackage rec {
     "--skip=state::tests::import_filter_signature_matches"
   ];
 
+  passthru.updateScript = unstableGitUpdater {
+    tagPrefix = "v";
+    branch = "main";
+  };
+
   meta = with lib; {
     description = "Erlang inspired runtime for WebAssembly";
     homepage = "https://lunatic.solutions";
-    changelog = "https://github.com/lunatic-solutions/lunatic/blob/v${version}/CHANGELOG.md";
+    changelog = "https://github.com/lunatic-solutions/lunatic/blob/main/CHANGELOG.md";
     license = with licenses; [
       mit # or
       asl20