diff --git a/src/backend/langflow/chat/manager.py b/src/backend/langflow/chat/manager.py
index 24e2212b8..5cd833c10 100644
--- a/src/backend/langflow/chat/manager.py
+++ b/src/backend/langflow/chat/manager.py
@@ -12,6 +12,7 @@ import asyncio
 from typing import Any, Dict, List
 
 from langflow.cache.flow import InMemoryCache
+import orjson
 
 
 class ChatHistory(Subject):