diff --git a/package.json b/package.json
index 235ceda..175c2e4 100644
--- a/package.json
+++ b/package.json
@@ -2,6 +2,7 @@
   "name": "modern-rembg",
   "type": "module",
   "version": "0.1.0",
+  "packageManager": "^pnpm@9.1.2",
   "description": "A remove image background javascript lib. only ESM.",
   "author": "wxm",
   "license": "MIT",