O.S.S.
PyUpdater uses the libraries listed below.
appdirs
https://github.com/ActiveState/appdirs/blob/master/LICENSE.txt
bsdiff4
https://github.com/ilanschnell/bsdiff4/blob/master/README.rst
certifi
https://github.com/certifi/python-certifi/blob/master/LICENSE
dsdev-utils
https://github.com/Digital-Sapphire/dsdev-utils/blob/master/LICENSE
PyInstaller
https://github.com/pyinstaller/pyinstaller/blob/develop/COPYING.txt
PyNacl
https://github.com/pyca/pynacl/blob/master/LICENSE
six
https://bitbucket.org/gutworth/six/src/986089f3d04e468458cc9f5b9b3be26fb3d75ade/LICENSE?at=default
stevedore
https://github.com/dreamhost/stevedore/blob/master/LICENSE
urllib3
https://github.com/shazow/urllib3/blob/master/LICENSE.txt