diff --git a/Gemfile b/Gemfile
index 1e01eae..f50abda 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
-source 'http://rubygems.org'
+source 'https://rubygems.org'
 
 platforms :jruby do
   gem 'jruby-openssl', '~> 0.7'