-r ./base.txt
sphinx==1.5.2
alabaster==0.7.9
releases==1.3.0 # Updated from 1.2.0

-r ./base.txt
sphinx==1.5.3
alabaster==0.7.9
releases==1.3.0 # Updated from 1.2.0

Update sphinx from 1.5.2 to 1.5.3
Update sphinx from 1.5.2 to 1.5.3