diff --git a/requirements.txt b/requirements.txt
index fe3d09e..3a4204a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 tavily-python==0.7.13
 python-dotenv==1.2.2
-langchain==0.3.30
+langchain==1.3.9
 langchain-openai==1.1.14
 langchain-core==1.3.3
 langgraph==1.0.10rc1