diff --git a/router.py b/router.py
index d1a1e38..e294555 100644
--- a/router.py
+++ b/router.py
@@ -396,6 +396,8 @@ async def shutdown_event() -> None:
     await app_state["session"].close()
     if app_state.get("probe_session") is not None:
         await app_state["probe_session"].close()
+        app_state["probe_session"] = None
+        app_state["probe_connector"] = None
 
     # Close Unix socket sessions
     for ep, sess in list(app_state.get("socket_sessions", {}).items()):