diff --git a/requirements.txt b/requirements.txt
index da8b975..aed09c7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 langgraph==0.0.1
-pytest==8.2.2
\ No newline at end of file
+pytest==8.2.2
+langchain-openai
\ No newline at end of file