diff --git a/package.json b/package.json
index 8a8e0c0..b6b674a 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "main": "index.js",
   "scripts": {
     "dev": "nodemon --exec ts-node src/index.ts",
-    "build": "tsup src/index.ts --format cjs,esm",
+    "build": "tsup src/index.ts --format cjs",
     "start": "node dist/index.js"
   },
   "keywords": [],