diff --git a/css/requirements.txt b/css/requirements.txt
index ec921e41f8..a35b53f719 100644
--- a/css/requirements.txt
+++ b/css/requirements.txt
@@ -1,6 +1,6 @@
 Template-Python==0.1.post1
 html5lib==1.0.1
-lxml==4.1.1
+lxml==4.6.2
 mercurial==4.5
 six==1.12.0
 webencodings==0.5.1