sphinx>=1.8.0,<2.0.0;python_version=='2.7'  # BSD
sphinx>=1.8.0,!=2.1.0;python_version>='3.4'  # BSD
sphinxcontrib-svg2pdfconverter>=0.1.0 # BSD
reno>=2.5.0 # Apache-2.0
openstackdocstheme>=1.18.1 # Apache-2.0