diff --git a/Gemfile b/Gemfile
index 215fb9b..d0618fd 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
-source 'http://rubygems.org'
+source 'https://rubygems.org'
 
 gem 'rails',  '~> 4.0'
 gem 'pg',     '~> 0.17'