diff --git a/backend/requirements.txt b/backend/requirements.txt
index f59ed98..b6457b1 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -7,7 +7,7 @@ Flask-Admin==1.5.0
 Flask-RESTful==0.3.6
 itsdangerous==0.24
 Jinja2==2.10
-lxml==4.1.1
+lxml==4.9.1
 MarkupSafe==1.0
 marshmallow==2.15.0
 peewee==2.10.2