diff --git a/requirements.txt b/requirements.txt
index 7cf01fd..25f5563 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,6 @@
 langchain-core>=0.3.0
 langchain-openai>=1.1.9
 langchain>=1.2.10
+langgraph>=1.0.8
 pydantic>=2.0.0
 python-dotenv>=1.0.0