Gemfile in zeppelin-0.8.2 vs Gemfile in zeppelin-0.8.3

@@ -1,5 +1,5 @@
-source :rubygems
+source 'https://rubygems.org'
 gemspec
 
 group :development do
   gem 'rb-fsevent', :require => RUBY_PLATFORM.include?('darwin') && 'rb-fsevent'
   gem 'growl', :require => RUBY_PLATFORM.include?('darwin') && 'growl'