chardet<4,>=3.0.4
cffi>=1.9.1
img2pdf<0.4,>=0.3.0
pdfminer.six==20181108
pikepdf<2,>=1.5.0
reportlab>=3.3.0
ruffus>=2.7.0

[:sys_platform == "darwin"]
Pillow!=5.1.0,>=4.0.0
