diff --git a/pyproject.toml b/pyproject.toml
index ad075bde..0fa098a1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -60,7 +60,7 @@ rag = [
     "faiss-cpu>=1.7.0",
     "sentence-transformers>=2.2.0",
     "beautifulsoup4>=4.12.0",
-    "lxml>=5.0.0",
+    "lxml>=6.1.1",
     "numpy>=1.21.0",
 ]