diff --git a/src/configs/javascript.ts b/src/configs/javascript.ts
index e4b76561..70b039ca 100644
--- a/src/configs/javascript.ts
+++ b/src/configs/javascript.ts
@@ -49,6 +49,7 @@ export function javascript(
         ],
 
         'antfu/no-top-level-await': 'error',
+        'antfu/top-level-function': 'error',
 
         'array-callback-return': 'error',
         'block-scoped-var': 'error',