diff --git a/packages/toolbox-langchain/requirements.txt b/packages/toolbox-langchain/requirements.txt
index 6d789731..9b66319a 100644
--- a/packages/toolbox-langchain/requirements.txt
+++ b/packages/toolbox-langchain/requirements.txt
@@ -1,5 +1,5 @@
 -e ../toolbox-core
-langchain-core==0.3.65
+langchain-core==0.3.66
 PyYAML==6.0.2
 pydantic==2.11.7
 aiohttp==3.12.13