diff --git a/requirements.txt b/requirements.txt
index fd1d484..67ec68f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ idna==2.7
 itsdangerous==0.24
 Jinja2==2.10
 kombu==4.2.1
-lxml==4.2.3
+lxml==4.9.1
 Mako==1.0.7
 MarkupSafe==1.0
 MySQL-python==1.2.5