diff --git a/Casks/panic-unison.rb b/Casks/panic-unison.rb
index 5f56b18487b..c9c4cdc9911 100644
--- a/Casks/panic-unison.rb
+++ b/Casks/panic-unison.rb
@@ -2,7 +2,7 @@ class PanicUnison < Cask
   version '2.1.10'
   sha256 'd7b15d7726dc892caa72a7476219ed3d06e86df704757670bb3236a82bdde5dc'
 
-  url 'http://download.panic.com/Unison/Unison%202.1.10.zip'
+  url "http://download.panic.com/Unison/Unison%20#{version}.zip"
   appcast 'http://www.panic.com/updates/update.php'
   homepage 'http://panic.com/unison/'