diff --git a/package.json b/package.json
index 98fb3bf..baea0a6 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
     "dev:client": "vite dev --port 5000",
     "dev": "NODE_ENV=development tsx server/index.ts",
     "build": "tsx script/build.ts",
-    "start": "NODE_ENV=production node dist/index.cjs",
+    "start": "NODE_ENV=production node dist/index.js",
     "check": "tsc",
     "db:push": "drizzle-kit push"
   },
diff --git a/script/build.ts b/script/build.ts
index 8279abb..2e92784 100644
--- a/script/build.ts
+++ b/script/build.ts
@@ -50,14 +50,17 @@ async function buildAll() {
     entryPoints: ["server/index.ts"],
     platform: "node",
     bundle: true,
-    format: "cjs",
-    outfile: "dist/index.cjs",
+    format: "esm",
+    outfile: "dist/index.js",
     define: {
       "process.env.NODE_ENV": '"production"',
     },
     minify: true,
     external: externals,
     logLevel: "info",
+    banner: {
+      js: "import { createRequire } from 'module'; import { fileURLToPath } from 'url'; import { dirname } from 'path'; const require = createRequire(import.meta.url); const __filename = fileURLToPath(import.meta.url); const __dirname = dirname(__filename);",
+    },
   });
 }