README.md in boilerpipe-ruby-0.4.4 vs README.md in boilerpipe-ruby-0.5.0

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 # Boilerpipe
 
-[![CircleCI](https://circleci.com/gh/gregors/boilerpipe-ruby/tree/master.svg?style=shield)](https://circleci.com/gh/gregors/boilerpipe-ruby/tree/master)
+[![CircleCI](https://circleci.com/gh/gregors/boilerpipe-ruby/tree/main.svg?style=shield)](https://circleci.com/gh/gregors/boilerpipe-ruby/tree/main)
 [![Gem Version](https://badge.fury.io/rb/boilerpipe-ruby.svg)](https://badge.fury.io/rb/boilerpipe-ruby)
 
 A pure ruby implemenation of the boilerpipe algorithm.
 
 This is a text extraction utility first written by Christian Kohlshutter - [presentation](http://videolectures.net/wsdm2010_kohlschutter_bdu/)