수정본

backend/app/services/websocket_manager.py

@@ -1,6 +1,6 @@
 from typing import Dict, List
 from fastapi import WebSocket
-import json
+from app.core.json_helpers import _dumps
 import logging
 
 logger = logging.getLogger(__name__)
@@ -47,7 +47,7 @@ class WebSocketManager:
     
     async def broadcast_json(self, data: dict):
         """JSON 데이터를 모든 클라이언트에게 브로드캐스트"""
-        message = json.dumps(data)
+        message = _dumps(data)
         await self.broadcast(message)
     
     async def send_market_update(self, stock_code: str, data: dict):