diff --git a/package.json b/package.json
index 5a4a43f..db8c4cd 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "type": "module",
   "version": "0.3.0",
   "description": "css color parsing, manupulation and conversion",
+  "sideEffects": false,
   "main": "dist/color.cjs",
   "module": "dist/color.esm.js",
   "types": "dist/color.d.ts",