diff --git a/scripts/vite.config.mjs b/scripts/vite.config.mjs
index feace56..0b94b08 100644
--- a/scripts/vite.config.mjs
+++ b/scripts/vite.config.mjs
@@ -12,6 +12,7 @@ export default defineConfig({
     lib: {
       entry: 'index.ts',
       formats: ['cjs'],
+      fileName: () => '[name].cjs',
     },
     minify: process.env.NODE_ENV === 'production',
     emptyOutDir: true,
@@ -21,9 +22,6 @@ export default defineConfig({
         ...builtinModules,
         ...Object.keys(pkg.dependencies || {}),
       ],
-      output: {
-        entryFileNames: '[name].cjs',
-      },
     },
   },
 })