diff --git a/gollum.gemspec b/gollum.gemspec
index ecfb4818..770cb2f6 100644
--- a/gollum.gemspec
+++ b/gollum.gemspec
@@ -36,6 +36,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'twitter_cldr', '~> 3.2.0'
   s.add_development_dependency 'mocha', '~> 1.1.0'
   s.add_development_dependency 'test-unit', '~> 3.1.0' if RUBY_VERSION =~ /^2.2/
+  s.add_development_dependency 'webrick', '~> 1.3.1'
 
   # = MANIFEST =
   s.files = %w[