diff --git a/Casks/spillo.rb b/Casks/spillo.rb
index b32437119..88165fb49 100644
--- a/Casks/spillo.rb
+++ b/Casks/spillo.rb
@@ -4,6 +4,7 @@ class Spillo < Cask
 
   url 'http://ddvl.me/3Q1U1J2N1W26/download/Spillo.zip'
   homepage 'http://bananafishsoftware.com/products/spillo/'
+  license :unknown
 
   app 'Spillo.app'
 end