diff --git a/requirements.txt b/requirements.txt
index 3c485c7..960bf57 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ gunicorn==20.0.4
 psycopg2-binary==2.8.4
 pytz==2019.3
 requests==2.22.0
-six==1.12.0
+six==1.16.0
 whitenoise==5.0.1
 celery==4.2.1
 python-dateutil==2.8.1