diff --git a/requirements.txt b/requirements.txt
index 0abef1c..7c0cfb3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ invoke==0.21.0
 Jinja2==2.8
 language-selector==0.1
 louis==2.6.4
-lxml==3.5.0
+lxml==4.9.1
 Mako==1.0.3
 MarkupSafe==0.23
 oauthlib==1.0.3