requests>=1.1.0 winkerberos >= 0.5.0; sys.platform == 'win32' pykerberos >= 1.1.8, < 2.0.0; sys.platform != 'win32' cryptography>=1.3 cryptography>=1.3; python_version!="3.3" cryptography>=1.3, <2; python_version=="3.3"