diff --git a/package.json b/package.json
index 8ba84ce..cf64008 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
   ],
   "exports": {
     ".": {
-      "import": "./lib/index.esm.js",
+      "import": "./lib/index.mjs",
       "require": "./lib/index.cjs.js",
       "default": "./lib/index.cjs.js"
     },
diff --git a/rollup.config.js b/rollup.config.js
index 9b8cd2e..67688cb 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -30,7 +30,7 @@ export default [
     external,
     output: [
       { dir: 'lib', entryFileNames: '[name].cjs.js', format: 'cjs' },
-      { dir: 'lib', entryFileNames: '[name].esm.js', format: 'es' },
+      { dir: 'lib', entryFileNames: '[name].mjs', format: 'es' },
     ],
     plugins: [commonjs(), resolve(), typescript(), json()],
   },