diff --git a/Gemfile b/Gemfile
index 108a8fb6..209d8673 100644
--- a/Gemfile
+++ b/Gemfile
@@ -12,3 +12,4 @@ gem 'activerecord-jdbc-adapter',        :platform => :jruby
 gem 'activerecord-jdbcsqlite3-adapter', :platform => :jruby
 gem 'jdbc-sqlite3',                     :platform => :jruby
 gem 'jruby-openssl',                    :platform => :jruby
+gem 'therubyrhino',                     :platform => :jruby