diff --git a/tasks/py.requirements.txt b/tasks/py.requirements.txt
index f5acef8..9a8132d 100644
--- a/tasks/py.requirements.txt
+++ b/tasks/py.requirements.txt
@@ -10,7 +10,7 @@
 
 invoke==1.4.1
 pycmd
-six==1.15.0
+six==1.16.0
 
 # -- HINT: path.py => path (python-install-package was renamed for python3)
 path >= 13.1.0;    python_version >= '3.5'