diff --git a/Casks/kobo-jp.rb b/Casks/kobo-jp.rb
index 40c815e61..b10cab160 100644
--- a/Casks/kobo-jp.rb
+++ b/Casks/kobo-jp.rb
@@ -1,5 +1,5 @@
 class KoboJp < Cask
-  version 'latest'
+  version :latest
   sha256 :no_check
 
   url 'http://download.kobobooks.com/desktop/RakutenBooks/KoboSetup.dmg'