diff --git a/Gemfile b/Gemfile
index 0c669ed..b4277fb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,5 @@
+source 'https://rubygems.org'
+
 gem "jekyll", "~>1.0.0"
 gem "coderay", "~>1.0.0"
 gem "kramdown"
diff --git a/Gemfile.lock b/Gemfile.lock
index 43c9213..1c07798 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,4 +1,5 @@
 GEM
+  remote: https://rubygems.org/
   specs:
     classifier (1.3.3)
       fast-stemmer (>= 1.0.0)