diff --git a/Gemfile b/Gemfile
index 37f5eaa..31ddf5d 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,2 +1,3 @@
 source 'https://rubygems.org'
 gem 'github-pages', group: :jekyll_plugins
+gem 'webrick', '~> 1.3', '>= 1.3.1'
\ No newline at end of file