diff --git a/requirements.txt b/requirements.txt
index a936a19..3a49de6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,7 +42,7 @@ jupyter-core==4.4.0
 kiwisolver==1.0.1
 kombu==4.2.1
 lazy-object-proxy==1.3.1
-lxml==4.2.5
+lxml==4.9.1
 mailchimp3==3.0.6
 Mako==1.0.7
 MarkupSafe==1.1.0