diff --git a/requirements-base.txt b/requirements-base.txt
index 93ba4f4..b0b835d 100644
--- a/requirements-base.txt
+++ b/requirements-base.txt
@@ -20,7 +20,7 @@ wsgiref==0.1.2
 keepassdb==0.2.1
 db_backup==0.1.3
 boto==2.26.1
-lxml==3.3.3
+lxml==4.6.3
 celery>=3.1,<3.2
 django-celery>=3.1,<3.1.17
 importlib