diff --git a/Gemfile b/Gemfile
index fda964b..9ba535a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -8,6 +8,9 @@ versions = JSON.parse(Net::HTTP.get(URI('https://pages.github.com/versions.json'
 
 gem 'github-pages', versions['github-pages']
 
+# https://github.com/jekyll/jekyll/issues/8523
+gem 'webrick', '~> 1.7'
+
 group :development do
   gem 'colored'
   gem 'fuzzy_match'