diff --git a/Gemfile b/Gemfile
index 13df48e2..15274ad5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,7 +7,7 @@
 # If you have issues with a gem: `bundle install --without-coffee-script`.
 
 RUBY_ENGINE = 'ruby' unless defined? RUBY_ENGINE
-source :rubygems unless ENV['QUICK']
+source 'https://rubygems.org' unless ENV['QUICK']
 gemspec
 
 gem 'rake'