diff --git a/lib/prepare.js b/lib/prepare.js
index 9ce48289ce..d1a193c4ce 100644
--- a/lib/prepare.js
+++ b/lib/prepare.js
@@ -175,7 +175,7 @@ async function resolveOptions (sourceDir) {
       options.notFoundPath = path.resolve(__dirname, 'default-theme/NotFound.vue')
     }
 
-    const themeEnhanceAppPath = path.resolve(themeDir, 'index.js')
+    const themeEnhanceAppPath = path.resolve(themeDir, 'enhanceApp.js')
     if (fs.existsSync(themeEnhanceAppPath)) {
       options.themeEnhanceAppPath = themeEnhanceAppPath
     }