diff --git a/requirements.txt b/requirements.txt
index 83f0c0a..dab5723 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ idna==2.9
 importlib-metadata==1.5.0
 itypes==1.1.0
 Jinja2==2.11.3
-lxml==4.6.5
+lxml==4.9.1
 Markdown==3.2.1
 MarkupSafe==1.1.1
 nodeenv==1.3.5