diff --git a/pyproject.toml b/pyproject.toml
index 5f76eb9e4..9f3661570 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,7 @@ dev = [
     "tach~=0.9",
 ]
 langchain = [
-    "langchain~=1.19"
+    "langchain==0.2.14"
 ]
 
 [project.urls]