diff --git a/Casks/iswiff.rb b/Casks/iswiff.rb
index c9225e43479..8826b2f66b9 100644
--- a/Casks/iswiff.rb
+++ b/Casks/iswiff.rb
@@ -1,5 +1,5 @@
 class Iswiff < Cask
-  version 'latest'
+  version :latest
   sha256 :no_check
 
   url 'http://echoone.com/iswiff/iSwiff.dmg'