diff --git a/requirements.txt b/requirements.txt
index c770a0b..caa7b79 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ gunicorn==20.0.4
 idna==2.8
 isodate==0.6.0
 jdatetime==3.6.2
-lxml==4.4.2
+lxml==4.9.1
 Pillow==6.2.1
 psycopg2==2.8.4
 pytz==2019.3