diff --git a/Gemfile b/Gemfile
index e11cac00..69bb11d3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 ruby '1.9.3' rescue nil
 
-source :rubygems
+source 'https://rubygems.org'
 
 gem 'puma'
 gem 'rack-ssl', '~> 1.3'
diff --git a/Gemfile.lock b/Gemfile.lock
index fcdcc460..91af9a57 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -16,7 +16,7 @@ GIT
       rake-pipeline (~> 0.6)
 
 GEM
-  remote: http://rubygems.org/
+  remote: https://rubygems.org/
   specs:
     POpen4 (0.1.4)
       Platform (>= 0.4.0)