diff --git a/Casks/mixture.rb b/Casks/mixture.rb
index 1a25c4464..171f98764 100644
--- a/Casks/mixture.rb
+++ b/Casks/mixture.rb
@@ -2,6 +2,7 @@ cask :v1 => 'mixture' do
   version :latest
   sha256 :no_check
 
+  # amazonaws.com is the official download host per the vendor homepage
   url 'https://s3.amazonaws.com/mixture-mixed-app/mac/Mixture.zip'
   appcast 'https://s3.amazonaws.com/mixture-mixed-app/mac/appcast.xml'
   homepage 'http://mixture.io/'