sphinx!=1.6.6,!=1.6.7,>=1.6.2,<2.0.0;python_version=='2.7' # BSD sphinx!=1.6.6,!=1.6.7,!=2.1.0,>=1.6.2;python_version>='3.4' # BSD openstackdocstheme>=1.20.0 # Apache-2.0 reno>=2.5.0 # Apache-2.0