diff --git a/Gemfile b/Gemfile
index c85f40c..64e1e13 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,4 +5,5 @@ gem "github-pages", "~> 228", group: :jekyll_plugins
 
 gem 'jekyll-dash'
 gem "liquid-md5"
-gem "jekyll-tagging"
\ No newline at end of file
+gem "jekyll-tagging"
+gem "webrick", "~> 1.8"
diff --git a/Gemfile.lock b/Gemfile.lock
index e6b62c7..22cd017 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -257,6 +257,7 @@ GEM
       unf_ext
     unf_ext (0.0.8.2)
     unicode-display_width (1.8.0)
+    webrick (1.8.1)
 
 PLATFORMS
   x86_64-linux
@@ -266,6 +267,7 @@ DEPENDENCIES
   jekyll-dash
   jekyll-tagging
   liquid-md5
+  webrick (~> 1.8)
 
 BUNDLED WITH
    2.4.10