diff --git a/pyproject.toml b/pyproject.toml
index 0f62c5067..1372d6a06 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,6 +12,7 @@ django = "4.2.20"
 djangorestframework = "3.16.0"
 drf-yasg = "1.21.7"
 django-filter = "23.2"
+langchain = "0.3.23"
 langchain-openai = "0.3.12"
 langchain-anthropic = "0.3.10"
 langchain-community = "0.3.21"