diff --git a/flake.nix b/flake.nix
index 01f787e..e4053c6 100644
--- a/flake.nix
+++ b/flake.nix
@@ -162,6 +162,7 @@
       devShells = forEachSupportedSystem ({ pkgs, system }: {
         default = pkgs.mkShell {
           inherit (self.checks.${system}.pre-commit-check) shellHook;
+          buildInputs = with pkgs; [ just ];
         };
       });
     };
diff --git a/justfile b/justfile
new file mode 100644
index 0000000..6c625c3
--- /dev/null
+++ b/justfile
@@ -0,0 +1,14 @@
+default:
+    echo 'Hello, world!'
+
+# Update a specific flake input
+update input:
+    nix flake lock --update-input {{input}} --commit-lock-file
+
+# Amend Update flake.lock PR
+flake-pr:
+    git branch -D update_flake_lock_action
+    gix fetch origin
+    git switch update_flake_lock_action
+    git commit --amend --no-edit
+    git push origin update_flake_lock_action --force-with-lease