diff --git a/Gemfile b/Gemfile
index 37f5eaa..33d9d3b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,2 +1,3 @@
-source 'https://rubygems.org'
+source "https://rubygems.org"
+
 gem 'github-pages', group: :jekyll_plugins