diff --git a/Gemfile b/Gemfile
index d2ceafe..9d80a76 100644
--- a/Gemfile
+++ b/Gemfile
@@ -24,6 +24,7 @@ group :jekyll_plugins do
   gem "jekyll-paginate-v2"
   gem "jekyll-tidy"
   gem "jekyll-algolia"
+  gem "webrick"
 end
 
 # Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
diff --git a/Gemfile.lock b/Gemfile.lock
index 81aa8e6..5c4c448 100755
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -102,6 +102,7 @@ GEM
     unicode-display_width (1.8.0)
     verbal_expressions (0.1.5)
     wdm (0.1.1)
+    webrick (1.7.0)
 
 PLATFORMS
   ruby
@@ -117,6 +118,7 @@ DEPENDENCIES
   tzinfo (~> 1.2)
   tzinfo-data
   wdm (~> 0.1.1)
+  webrick
 
 BUNDLED WITH
    2.2.24