diff --git a/requirements.txt b/requirements.txt
index 6f8825d..e01ff4a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,7 +38,7 @@ ipaddress==1.0.14
 isort==4.0.0
 kombu==3.0.26
 lockfile==0.10.2
-lxml==3.4.4
+lxml==4.9.1
 mccabe==0.3.1
 mysqlclient==1.3.6
 ndg-httpsclient==0.4.0