diff --git a/package.json b/package.json
index fc87e57..9071f56 100644
--- a/package.json
+++ b/package.json
@@ -4,5 +4,8 @@
   "scripts": {
     "build": "rollup -c rollup.config.mjs",
     "watch": "rollup -c rollup.config.mjs --watch"
+  },
+  "devDependencies": {
+    "rollup": "^4"
   }
 }