diff --git a/Casks/epub-to-pdf.rb b/Casks/epub-to-pdf.rb
index ab612d9e0ee..11a0459ff77 100644
--- a/Casks/epub-to-pdf.rb
+++ b/Casks/epub-to-pdf.rb
@@ -4,6 +4,7 @@ class EpubToPdf < Cask
 
   url 'http://epub-2-pdf.googlecode.com/files/e2p-3.dmg'
   appcast 'https://code.google.com/feeds/p/epub-2-pdf/downloads/basic',
+          :sha256 => '229b6653b24597a90cf5c48f1fca8de73892d6342c7800e84c9d828e976dfe24',
           :format => :unknown
   homepage 'https://code.google.com/p/epub-2-pdf'
   license :oss