diff --git a/Casks/deeper-lion.rb b/Casks/deeper-lion.rb
index e1b3856fe..674cf79f1 100644
--- a/Casks/deeper-lion.rb
+++ b/Casks/deeper-lion.rb
@@ -4,6 +4,7 @@ class DeeperLion < Cask
 
   url 'http://www.titanium.free.fr/download/107/Deeper.dmg'
   homepage 'http://www.titanium.free.fr/downloaddeeper.php'
+  license :unknown
 
   app 'Deeper.app'
 end