diff --git a/.gitignore b/.gitignore
index 2c28878..67cf618 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,6 +10,7 @@ rdoc
 .ruby-gemset
 .rspec
 spec/dummy/tmp/**/*
+spec/dummy/log/**/*
 *.sqlite3
 .rspec
 gemfiles/*.lock
diff --git a/Appraisals b/Appraisals
index a0fc974..c67514e 100644
--- a/Appraisals
+++ b/Appraisals
@@ -16,5 +16,4 @@ end
 
 appraise 'rails_4_2' do
   gem 'rails', '4.2.0.rc1'
-  gem 'responders', '~> 2.0'
 end
diff --git a/app/controllers/judge/validations_controller.rb b/app/controllers/judge/validations_controller.rb
index 2215ad6..b01e4d3 100644
--- a/app/controllers/judge/validations_controller.rb
+++ b/app/controllers/judge/validations_controller.rb
@@ -3,7 +3,7 @@ class ValidationsController < ActionController::Base
     include Judge::Controller
 
     def build
-      respond_with(validation(params))
+      render json: validation(params)
     end
   end
-end
\ No newline at end of file
+end
diff --git a/judge.gemspec b/judge.gemspec
index 3178746..110a378 100644
--- a/judge.gemspec
+++ b/judge.gemspec
@@ -14,7 +14,6 @@ Gem::Specification.new do |s|
   s.license = 'MIT'
 
   s.add_runtime_dependency     'rails',                  '>= 3.1'
-  s.add_runtime_dependency     'responders',             '>= 0.9'
 
   s.add_development_dependency 'rspec-rails',            '~> 3.1'
   s.add_development_dependency 'rspec-extra-formatters', '~> 1.0'
diff --git a/lib/judge/controller.rb b/lib/judge/controller.rb
index 11a2073..8e555be 100644
--- a/lib/judge/controller.rb
+++ b/lib/judge/controller.rb
@@ -1,14 +1,8 @@
 require 'uri'
-require 'responders'
 
 module Judge
   module Controller
 
-    def self.included(base)
-      base.clear_respond_to
-      base.respond_to(:json)
-    end
-
     def validation(params)
       params = normalized_params(params)
       if params_present?(params) && params_exposed?(params)