diff --git a/src/api/project_routes.py b/src/api/project_routes.py
index 234bedc..234213b 100644
--- a/src/api/project_routes.py
+++ b/src/api/project_routes.py
@@ -22,8 +22,8 @@ async def list_projects():
     reg = _registry()
     projects = reg.list_projects()
     # 实时统计每个项目的任务数
-    from src.blackboard.db import Blackboard
     from pathlib import Path
+    import sqlite3
     for pid, info in projects.items():
         if info.get("status") in ("archived", "deleted"):
             continue