diff --git a/packages/psd/package.json b/packages/psd/package.json
index 95cdf79..1980085 100644
--- a/packages/psd/package.json
+++ b/packages/psd/package.json
@@ -10,7 +10,8 @@
     "Kang Ye Hyoung <yehyoung.kang@webtoonscorp.com>"
   ],
   "type": "module",
-  "main": "./dist/index.js",
+  "exports": "./dist/index.js",
+  "main": "./dist/index.cjs",
   "types": "./dist/index.d.ts",
   "files": [
     "dist"
diff --git a/packages/psd/vite.config.ts b/packages/psd/vite.config.ts
index 03988f8..7dcdef3 100644
--- a/packages/psd/vite.config.ts
+++ b/packages/psd/vite.config.ts
@@ -11,8 +11,8 @@ export default defineConfig((env) => ({
     lib: {
       entry: path.resolve(__dirname, "src/index.ts"),
       // Use arrow function instead of plain string to avoid emitting "index.es.js"
-      fileName: () => "index.js",
-      formats: ["es"],
+      fileName: (format) => (format === "cjs" ? "index.cjs" : "index.js"),
+      formats: ["cjs", "es"],
     },
     rollupOptions: {
       plugins: [