diff --git a/requirements.txt b/requirements.txt
index 1c39f3a..01499f8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,5 +22,5 @@ python-dateutil==2.8.1
 requests==2.23.0
 s3transfer==0.3.3
 setuptools==44.1.1
-six==1.14.0
+six==1.15.0
 transip==2.1.2