Jinja2 >= 2.8, < 3.0
PyYAML >= 3.11, < 4.0  # rq.filter: !=4.1
Flask >= 1.0.2, < 2.0
whichcraft >= 0.4.1, < 0.5
ipaddress >= 1.0.6, < 2; python_version < '3.3'
