diff --git a/Casks/shiori.rb b/Casks/shiori.rb
index 5190a236655..f423b993ca9 100644
--- a/Casks/shiori.rb
+++ b/Casks/shiori.rb
@@ -3,7 +3,8 @@ class Shiori < Cask
   sha256 'c832edc2762fdaadc80bfe042ee6f7bd128955e3d7b27bdc5baf5806a0c8a719'
 
   url "http://aki-null.net/shiori/release/Shiori_#{version}.zip"
-  appcast 'http://aki-null.net/shiori/appcast.xml'
+  appcast 'http://aki-null.net/shiori/appcast.xml',
+          :sha256 => '244668dde7c677ddaaccc55c997874e13d3c8de5213c5e0810eeacd6fdcc713e'
   homepage 'http://aki-null.net/shiori/'
   license :unknown