As of Pillow 3.0.0 this is fixed, so make Pillow 3 a requirement
@@ -218,7 +218,7 @@ setup(
],
install_requires=[
'ruffus>=2.6.3',
'Pillow>=2.4.0',
'Pillow>=3.0.0',
'reportlab>=3.1.44',
'PyPDF2>=1.25.1',
'img2pdf>=0.2.0',
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