diff --git a/dev-requirements.txt b/dev-requirements.txt
index 40fa4f2..ac82acd 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -18,7 +18,7 @@ imagesize==1.1.0
 isort==4.3.16
 Jinja2==2.10.1
 lazy-object-proxy==1.3.1
-lxml==4.2.5
+lxml==4.9.1
 MarkupSafe==1.1.1
 mccabe==0.6.1
 more-itertools==7.0.0