diff --git a/Casks/avira-antivirus.rb b/Casks/avira-antivirus.rb
index 859989a26b5..eb5b0d7e597 100644
--- a/Casks/avira-antivirus.rb
+++ b/Casks/avira-antivirus.rb
@@ -2,6 +2,7 @@ cask 'avira-antivirus' do
   version :latest
   sha256 :no_check
 
+  # avira-update.com was verified as official when first introduced to the cask
   url 'https://install.avira-update.com/package/wks_avira/osx/int/pecl/Avira_Free_Antivirus_for_Mac.pkg'
   name 'Avira Antivirus'
   homepage 'https://www.avira.com/en/free-antivirus-mac'