Correct range of six
@@ -5,7 +5,7 @@ colorama>=0.3.3, <0.5.0
PyYAML>=3.11, <6.0
patch-ng==1.17.1
fasteners>=0.14.1
-six==1.12.0
+six>=1.10.0,<1.13.0
node-semver==0.6.1
distro>=1.0.2, <1.2.0
pylint>=1.9.3, <2.0; python_version < '3'
