diff --git a/Gemfile b/Gemfile
index 21e0951..e04b261 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
-source :rubygems
+source 'https://rubygems.org'
 
 gem 'jruby-openssl', :platforms => :jruby
 gem 'rake'