diff --git a/package.json b/package.json
index 3a69b61..4a0158a 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,6 @@
   },
   "license": "MIT",
   "author": "colder",
-  "sideEffects": false,
   "main": "dist/index.js",
   "source": "src/index.ts",
   "types": "dist/index.d.ts",