diff --git a/requirements.txt b/requirements.txt
index 780108e..39c5764 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ idna==2.6
 ipaddress==1.0.22
 itsdangerous==0.24
 Jinja2==2.10
-lxml==4.2.0
+lxml==4.6.3
 MarkupSafe==1.0
 mccabe==0.6.1
 Naked==0.1.31