diff --git a/packages/toolbox-langchain/requirements.txt b/packages/toolbox-langchain/requirements.txt
index 1672ccf4..c20f5f57 100644
--- a/packages/toolbox-langchain/requirements.txt
+++ b/packages/toolbox-langchain/requirements.txt
@@ -1,5 +1,5 @@
 -e ../toolbox-core
-langchain-core==0.3.78
+langchain-core==1.0.4
 PyYAML==6.0.3
 pydantic==2.11.10
 aiohttp==3.13.0