diff --git a/package.json b/package.json
index e51397c..a3e977b 100644
--- a/package.json
+++ b/package.json
@@ -39,6 +39,7 @@
     "Jason Miller <jason@developit.ca>"
   ],
   "license": "MIT",
+  "sideEffects": false,
   "files": [
     "dist",
     "index.d.ts"