diff --git a/requirements.txt b/requirements.txt
index 8ab4026..f84ad33 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ cssselect==0.9.1
 docopt==0.6.2
 html5lib==0.999
 Jinja2==2.7.3
-lxml==3.4.0
+lxml==4.9.1
 Markdown==2.5.1
 MarkupSafe==0.23
 pycparser==2.10