diff --git a/package.json b/package.json
index 1722a67..80fd09a 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "version": "5.2.1",
   "description": "Validate your env variable using Ajv and dotenv",
   "main": "index.js",
+  "type": "commonjs",
   "types": "types/index.d.ts",
   "scripts": {
     "lint": "standard | snazzy",