diff --git a/Gemfile b/Gemfile
index af1049e4..2be6bad1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-source :rubygems
+source "https://rubygems.org"
 
 gem "rails", "2.3.17"