diff --git a/Casks/biba.rb b/Casks/biba.rb
index b46fec9756b..4b940724443 100644
--- a/Casks/biba.rb
+++ b/Casks/biba.rb
@@ -4,6 +4,8 @@ cask :v1 => 'biba' do
 
   url 'https://www.biba.com/osx_downloads/dmg'
   name 'Biba'
+  appcast 'https://biba.com/osx_downloads/appcast',
+          :sha256 => '1ba615b670b0bc57c1ceef52a86399dfc848cff92a9e7f13f6e628217972d1db'
   homepage 'https://www.biba.com'
   license :closed