diff --git a/Casks/astrill.rb b/Casks/astrill.rb
index bd93c2ad2cc..c1316c718a4 100644
--- a/Casks/astrill.rb
+++ b/Casks/astrill.rb
@@ -4,7 +4,7 @@ cask :v1 => 'astrill' do
 
   url 'http://download.astrill.com/astrill-setup-mac.dmg'
   homepage 'https://www.astrill.com'
-  license :unknown    # todo: improve this machine-generated value
+  license :unknown    # todo: change license and remove this comment; ':unknown' is a machine-generated placeholder
 
   pkg 'Astrill Setup.mpkg'