diff --git a/Casks/appium.rb b/Casks/appium.rb
index c5da0bc4f8f..91e12a630b6 100644
--- a/Casks/appium.rb
+++ b/Casks/appium.rb
@@ -2,6 +2,7 @@ cask :v1 => 'appium' do
   version '1.3.4'
   sha256 '6e35270bf93db653556a6be0132f1720d5642e817f927b2db394d106b2a37252'
 
+  # bitbucket.org is the official download host per the vendor homepage
   url "https://bitbucket.org/appium/appium.app/downloads/appium-#{version}.dmg"
   name 'Appium'
   homepage 'http://appium.io'