diff --git a/Casks/vagrant171.rb b/Casks/vagrant171.rb
index 73bd70b4f..7742c6787 100644
--- a/Casks/vagrant171.rb
+++ b/Casks/vagrant171.rb
@@ -2,6 +2,7 @@ cask :v1 => 'vagrant171' do
   version '1.7.1'
   sha256 'eaeb3ad6624ccaeaefa6fc7a77a2f5d9640ef9385c5eeebdb90602d5f2011176'
 
+  # bintray.com is the official download host per the vendor homepage
   url "https://dl.bintray.com/mitchellh/vagrant/vagrant_#{version}.dmg"
   homepage 'http://www.vagrantup.com'
   license :mit