diff --git a/Gemfile b/Gemfile
index ea95ac006363efd3434eded7fbed5eeb0f70e814..8f4c67cd2693a3014810906173edc8d7c15afe8f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -46,3 +46,5 @@ gem "tzinfo-data", platforms: [:mingw, :mswin, :x64_mingw, :jruby]
 gem "wdm", "~> 0.1.1" if Gem.win_platform?
 
 gem 'jekyll-spaceship', "~> 0.9"
+
+gem "webrick", "~> 1.7"