diff --git a/Gemfile b/Gemfile
index a6f48e1..8a3059a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
-source :rubygems
+source 'https://rubygems.org'
 
 gemspec
 
@@ -9,4 +9,4 @@ group :development do
   gem "mocha", "0.9.8"
   gem "blankslate", "~> 2.1.2.0"
   gem "hanna", "~> 0.1.0"
-end
\ No newline at end of file
+end