diff --git a/requirements.txt b/requirements.txt
index aed09c7..43a73f4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
 langgraph==0.0.1
 pytest==8.2.2
-langchain-openai
\ No newline at end of file
+langchain-openai
+langchain-core
\ No newline at end of file