Babel>=1.3, <2.9
Flask-Babel>=0.11.1,<2.1.0
Flask-Login>=0.3.2,<0.5.1
Flask-Principal>=0.3.2,<0.5.1
singledispatch>=3.4.0.0,<3.5.0.0
backports_abc>=0.4
Flask>=1.0.2,<1.2.0
iso-639>=0.4.5,<0.5.0
PyPDF3>=1.0.0,<1.0.4
pytz>=2016.10
requests>=2.11.1,<2.25.0
SQLAlchemy>=1.3.0,<1.4.0    # oauth fails on 1.4+ due to import problems in flask_dance
tornado>=4.1,<6.2
Wand>=0.4.4,<0.7.0
unidecode>=0.04.19,<1.2.0