diff --git a/requirements.txt b/requirements.txt
index 4648dc5..e6c7763 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 docker==4.0.2
 molecule==2.20.2
 pytest==4.5.0
-six==1.11.0
+six==1.16.0
 tox==3.13.2
 testinfra==3.0.5