diff --git a/Gemfile b/Gemfile
index 0fa9a778f9a..5b155ec3fa3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -63,6 +63,7 @@ end
 group :backend do
   gem 'teaspoon', github: 'jejacks0n/teaspoon', require: false
   gem 'teaspoon-mocha', github: 'jejacks0n/teaspoon', require: false
+  gem 'webrick', require: false
 end
 
 group :utils do