diff --git a/Casks/iterm2-nightly.rb b/Casks/iterm2-nightly.rb
index 17d372279..709bba852 100644
--- a/Casks/iterm2-nightly.rb
+++ b/Casks/iterm2-nightly.rb
@@ -4,6 +4,7 @@ class Iterm2Nightly < Cask
 
   url 'http://www.iterm2.com/nightly/latest'
   homepage 'http://www.iterm2.com/'
+  license :oss
 
   app 'iTerm.app'
 end