diff --git a/requirements/tests.txt b/requirements/tests.txt
index 153810248..e25f22db0 100644
--- a/requirements/tests.txt
+++ b/requirements/tests.txt
@@ -3,7 +3,7 @@ coverage==4.4
 html5lib==0.9999999
 mock==1.0.1
 Jinja2==2.7.3
-lxml==3.4.2
+lxml==4.9.1
 beautifulsoup4==4.4.0
 django-sekizai==0.9.0
 csscompressor==0.9.4