diff --git a/Gemfile b/Gemfile
index f2ab0b3b4ae707298e69b1aa76915d0fdefab2b3..c18d867d2b271c11e65de384d6e993c1e05af614 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
-source "http://rubygems.org"
+source "https://rubygems.org"
 
 group :development, :test do
   gem 'rake'