diff --git a/flake.nix b/flake.nix
index 5498d61..62053c6 100644
--- a/flake.nix
+++ b/flake.nix
@@ -49,6 +49,7 @@
         ...
       }: {
         devShells.default = pkgs.mkShell {nativeBuildInputs = [config.packages.nix];};
+        formatter = pkgs.alejandra;
       };
     };