diff --git a/Gemfile b/Gemfile
index 96ddfbe..3ee117b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
-source :rubygems
+source 'https://rubygems.org'
 
 gem 'colored'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 2149c37..73ba4f5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -15,7 +15,7 @@ GIT
       rake-pipeline (~> 0.6)
 
 GEM
-  remote: http://rubygems.org/
+  remote: https://rubygems.org/
   specs:
     POpen4 (0.1.4)
       Platform (>= 0.4.0)