diff --git a/Casks/ipalette.rb b/Casks/ipalette.rb
index 268ac824f55..e5bc1e9a06e 100644
--- a/Casks/ipalette.rb
+++ b/Casks/ipalette.rb
@@ -3,7 +3,8 @@ class Ipalette < Cask
   sha256 '1a2b56a3c9c3072e4857e8982d5197583463e3d745b8cdce44d7dec18a8d868d'
 
   url "http://ipalette.info/downloads/iPalette-#{version}.zip"
-  appcast 'http://ipalette.info/appcast.xml'
+  appcast 'http://ipalette.info/appcast.xml',
+          :sha256 => '34c43891e7e6775f59d9e22122c05992e56ef746d7ac668ccd3bae90f7ac312a'
   homepage 'http://ipalette.info/'
   license :unknown