sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
openstackdocstheme>=1.18.1  # Apache-2.0
os-api-ref>=1.6.0 # Apache-2.0
sphinxcontrib-seqdiag>=0.8.4  # BSD
# releasenotes
reno>=2.5.0 # Apache-2.0