diff --git a/backend/requirements.txt b/backend/requirements.txt
index cb5d96d..d233751 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -25,7 +25,7 @@ transformers>=4.30.0
 sentence-transformers>=2.2.0
 langchain>=0.1.0
 langchain-core>=0.0.1
-langchain-openai>=1.1.11
+langchain-openai>=1.3.5
 langgraph>=0.0.10
 qdrant-client>=1.6.0
 huggingface_hub>=0.20