diff --git a/package.json b/package.json
index db865c7c..c09da04d 100644
--- a/package.json
+++ b/package.json
@@ -15,6 +15,7 @@
     "posix.js",
     "lib"
   ],
+  "sideEffects": false,
   "main": "index.js",
   "engines": {
     "node": ">=10"