diff --git a/requirements.txt b/requirements.txt
index b750fcf6b..b02112dcb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ psycopg2-binary==2.8.6
 python-dotenv==0.17.1
 requests==2.25.1
 simplejson==3.17.2
-six==1.15.0
+six==1.16.0
 webdavclient3==3.14.5
 whitenoise==5.2.0
 icalendar==4.0.7