diff --git a/Gemfile b/Gemfile
index ea9d3dd..ea7725b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -15,6 +15,7 @@ source "https://rubygems.org"
 
 gem "jekyll"
 gem "minimal-mistakes-jekyll"
+gem "webrick"
 
 # The following plugins are automatically loaded by the theme-gem:
 #   gem "jekyll-paginate"