diff --git a/package.json b/package.json
index eb40fa1..bd06a9f 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "version": "15.8.1",
   "main": "dist/nouislider.js",
   "module": "dist/nouislider.mjs",
+  "sideEffects": false,
   "style": "dist/nouislider.min.css",
   "types": "dist/nouislider.d.ts",
   "license": "MIT",