diff --git a/pyproject.toml b/pyproject.toml
index c0a6c2d1..c374934a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,6 +57,7 @@ dependencies = [
     "langchain >= 0.0.187",
     "pypdf >= 3.9.0",
     "requests >= 2.26.0",
+    "bs4 >= 0.0.1",
 ]
 dynamic = ["version"]