diff --git a/services/backend/vector_db_api/requirements.txt b/services/backend/vector_db_api/requirements.txt
index eb46876..8430894 100644
--- a/services/backend/vector_db_api/requirements.txt
+++ b/services/backend/vector_db_api/requirements.txt
@@ -1,5 +1,5 @@
 fastapi==0.95.1
-langchain==0.0.187
+langchain==0.2.2
 openai==0.27.7
 pymilvus==2.2.8
 python-dotenv==1.0.0