prometheus_client==0.8.0
humanize
pytz

[:python_version < "3.5.2"]
tornado<6.0.0,>=5.0.0

[:python_version < "3.7"]
celery>=3.1.0

[:python_version == "2.7"]
futures

[:python_version >= "3.5.2"]
tornado<7.0.0,>=5.0.0

[:python_version >= "3.7"]
celery>=4.3.0
