diff --git a/Gemfile b/Gemfile
index 5c41b36..370f9ff 100644
--- a/Gemfile
+++ b/Gemfile
@@ -14,4 +14,5 @@ group :jekyll_plugins do
   gem "jemoji"
   gem "jekyll-include-cache"
   gem "jekyll-algolia"
+  gem "webrick"
 end