attrs>=22.1.0
fonttools[ufo]>=4.0.0

[:python_version < "3.8"]
typing_extensions

[converters]
cattrs>=22.2.0

[json]
cattrs>=22.2.0

[json:platform_python_implementation != "PyPy"]
orjson

[lxml]
lxml

[msgpack]
cattrs>=22.2.0
msgpack
