diff --git a/app/database.py b/app/database.py
index ea46a04..553ddb8 100644
--- a/app/database.py
+++ b/app/database.py
@@ -33,6 +33,8 @@ Path(sqlite_path).parent.mkdir(parents=True, exist_ok=True)
 engine = create_async_engine(
     f"sqlite+aiosqlite:///{sqlite_path}",
     echo=False,
+    pool_size=1,
+    max_overflow=0,
 )
 
 # ──────────────────────────── 会话工厂 ────────────────────────────