diff --git a/package.json b/package.json
index b488e026..1562a03c 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
   "main": "./dist/index.js",
   "exports": {
     "require": "./dist/index.js",
-    "default": "./dist/index-esm.mjs"
+    "default": "./dist/index.js"
   },
   "publishConfig": {
     "access": "public"
diff --git a/rollup.config.js b/rollup.config.mjs
similarity index 80%
rename from rollup.config.js
rename to rollup.config.mjs
index e0ed737a..b6fa6f2d 100644
--- a/rollup.config.js
+++ b/rollup.config.mjs
@@ -6,7 +6,6 @@ export default {
     resolve({}),
   ],
   output: [
-    { format: 'esm', file: './dist/index-esm.mjs' },
     { format: 'cjs', file: './dist/index.js' },
   ],
   external: [],