diff --git a/package.json b/package.json
index ee96ba3..4aa5bd0 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,9 @@
   "license": "ISC",
   "keywords": [],
   "main": "index.js",
+  "engines": {
+    "pnpm": "^9"
+  },
   "scripts": {
     "test": "vitest",
     "docs:dev": "vitepress dev",