diff --git a/02-tutor-study-companion/requirements.txt b/02-tutor-study-companion/requirements.txt
index d064196..ce91e27 100644
--- a/02-tutor-study-companion/requirements.txt
+++ b/02-tutor-study-companion/requirements.txt
@@ -1,6 +1,6 @@
 # Tutor & Study Companion — runtime dependencies
 langgraph>=1.2.7
-langchain-core>=1.4.9
+langchain-core>=1.6.1
 streamlit>=1.58.0
 
 # LLM providers (install the one you use)