Jinja2
# This should be changed to msgpack-python for Packages
# msgpack-python>0.3,!=0.5.5
msgpack>=0.5,!=0.5.5
PyYAML<5.1
MarkupSafe
requests>=1.0.0
tornado>=4.2.1,<6.0; python_version < '3'
tornado>=4.2.1,<5.0; python_version >= '3.4'

# Required by Tornado to handle threads stuff.
futures>=2.0; python_version < '3.0'
