diff --git a/Gemfile b/Gemfile
index 37f5eaa42e5044a403727c7b15108bc41df2a0ca..1290b9e55e312a58e1eff95cb3006ebc2c23d974 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,2 +1,3 @@
 source 'https://rubygems.org'
 gem 'github-pages', group: :jekyll_plugins
+gem 'jekyll-sitemap', group: :jekyll_plugins