diff --git a/Casks/google-japanese-ime.rb b/Casks/google-japanese-ime.rb
index d7bce94b8..4f6ca7146 100644
--- a/Casks/google-japanese-ime.rb
+++ b/Casks/google-japanese-ime.rb
@@ -4,6 +4,7 @@ class GoogleJapaneseIme < Cask
 
   url 'https://dl.google.com/japanese-ime/latest/GoogleJapaneseInput.dmg'
   homepage 'https://www.google.co.jp/ime/'
+  license :unknown
 
   pkg 'GoogleJapaneseInput.pkg'
   uninstall :pkgutil => 'com.google.pkg.GoogleJapaneseInput',