README.md in twilio-ruby-5.39.2 vs README.md in twilio-ruby-5.39.3

@@ -2,10 +2,12 @@
 
 [![Build Status](https://img.shields.io/travis/twilio/twilio-ruby.svg)][travis]
 [![Gem Version](https://img.shields.io/gem/v/twilio-ruby.svg)](https://rubygems.org/gems/twilio-ruby)
 [![Learn with TwilioQuest](https://img.shields.io/static/v1?label=TwilioQuest&message=Learn%20to%20contribute%21&color=F22F46&labelColor=1f243c&style=flat-square&logo=data:image/png;base64,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)](https://twil.io/learn-open-source)
 
+**The default branch name for this repository has been changed to `main` as of 07/27/2020.**
+
 ## Documentation
 
 The documentation for the Twilio API can be found [here][apidocs].
 
 The Ruby library documentation can be found [here][libdocs] and individual releases [here][refdocs].
@@ -30,16 +32,16 @@
 ## Installation
 
 To install using [Bundler][bundler] grab the latest stable version:
 
 ```ruby
-gem 'twilio-ruby', '~> 5.39.2'
+gem 'twilio-ruby', '~> 5.39.3'
 ```
 
 To manually install `twilio-ruby` via [Rubygems][rubygems] simply gem install:
 
 ```bash
-gem install twilio-ruby -v 5.39.2
+gem install twilio-ruby -v 5.39.3
 ```
 
 To build and install the development branch yourself from the latest source:
 
 ```bash