diff --git a/.gitignore b/.gitignore
index c24a835..72986d5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,9 @@
 # See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
 
+# other lockfiles
+package-lock.json
+yarn.lock
+
 # dependencies
 /node_modules
 /.pnp
diff --git a/package.json b/package.json
index a42c193..335d57d 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
   "private": true,
   "type": "module",
   "scripts": {
+    "preinstall": "npx -y only-allow pnpm",
     "build": "next build",
     "dev": "PORT=3002 next dev --turbo",
     "preview": "next build && next start",