diff --git a/backend/server.py b/backend/server.py
index 6266cec..be2631c 100644
--- a/backend/server.py
+++ b/backend/server.py
@@ -216,7 +216,7 @@ def get_me(sid, data):
 def disconnect(sid):
     global online_players
     online_players -= 1
-    if (p := sio.get_session(sid)) is not None:
+    if (p := sio.get_session(sid)) is not None and isinstance(p, Player):
         sio.emit('players', room='lobby', data=online_players)
         if p.game and p.disconnect():
             sio.close_room(p.game.name)