diff --git a/requirements.txt b/requirements.txt
index 51354479..d1c2e3c1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ evaluate==0.4.3
 hnswlib==0.8.0
 jsonschema==4.23.0
 kaleido==0.2.1
-langchain==0.3.0
+langchain==1.2.15
 langchain-community==0.3.0
 levenshtein==0.26.0
 lxml==5.3.0