diff --git a/backend/app/main.py b/backend/app/main.py
index df8d8de..ac1f921 100644
--- a/backend/app/main.py
+++ b/backend/app/main.py
@@ -1145,7 +1145,7 @@ async def update_ai_config(config: LLMConfig):
 
 
 # 前端静态文件服务
-FRONTEND_DIR = Path(__file__).parent.parent / "frontend" / "dist"
+FRONTEND_DIR = Path(__file__).parent.parent.parent / "frontend" / "dist"
 
 @app.get("/")
 async def serve_frontend():