diff --git a/requirements.txt b/requirements.txt
index 2d824ca9..1b7ffa26 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ gnureadline==6.3.8
 idna==2.8
 imagesize==1.1.0
 Jinja2==2.10
-lxml==4.2.5
+lxml==4.9.1
 MarkupSafe==1.1.0
 mccabe==0.6.1
 oauthlib==2.1.0