diff --git a/.gitignore b/.gitignore
index 8bfce63..d688e03 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@
 **/*/*.gem
 **/*/*.sqlite3
 **/*/public/assets
+*.swp
diff --git a/.ruby-version b/.ruby-version
new file mode 100644
index 0000000..276cbf9
--- /dev/null
+++ b/.ruby-version
@@ -0,0 +1 @@
+2.3.0
diff --git a/.travis.yml b/.travis.yml
index 6c59b5b..1e052a7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,6 +5,7 @@ env:
   - "RAILS_VERSION=3.2.22"
   - "RAILS_VERSION=4.2.0"
   - "RAILS_VERSION=5.0.0"
+  - "RAILS_VERSION=5.1.1"
 cache: bundler
 install: bundle update
 before_script:
diff --git a/Gemfile b/Gemfile
index 298afb3..e642a0f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@ source "https://rubygems.org"
 
 # Allow the rails version to come from an ENV setting so Travis can test multiple versions.
 # See http://www.schneems.com/post/50991826838/testing-against-multiple-rails-versions/
-rails_version = ENV['RAILS_VERSION'] || '3.2.22'
+rails_version = ENV['RAILS_VERSION'] || '5.1.1'
 
 gem 'rails', "#{rails_version}"
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 60d9c8b..8697be9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,56 +1,67 @@
 PATH
-  remote: ./rswag-api
+  remote: rswag-api
   specs:
-    rswag-api (1.2.0)
-      rails (>= 3.1, < 5.1)
+    rswag-api (1.2.1)
+      rails (>= 3.1, < 5.2)
 
 PATH
-  remote: ./rswag-specs
+  remote: rswag-specs
   specs:
-    rswag-specs (1.2.0)
+    rswag-specs (1.2.1)
+      json (~> 1.8)
       json-schema (~> 2.2)
-      rails (>= 3.1, < 5.1)
+      rails (>= 3.1, < 5.2)
       rspec-rails (>= 2.14, < 4)
 
 PATH
-  remote: ./rswag-ui
+  remote: rswag-ui
   specs:
-    rswag-ui (1.2.0)
-      rails (>= 3.1, < 5.1)
+    rswag-ui (1.2.1)
+      rails (>= 3.1, < 5.2)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    actionmailer (3.2.22)
-      actionpack (= 3.2.22)
-      mail (~> 2.5.4)
-    actionpack (3.2.22)
-      activemodel (= 3.2.22)
-      activesupport (= 3.2.22)
-      builder (~> 3.0.0)
-      erubis (~> 2.7.0)
-      journey (~> 1.0.4)
-      rack (~> 1.4.5)
-      rack-cache (~> 1.2)
-      rack-test (~> 0.6.1)
-      sprockets (~> 2.2.1)
-    activemodel (3.2.22)
-      activesupport (= 3.2.22)
-      builder (~> 3.0.0)
-    activerecord (3.2.22)
-      activemodel (= 3.2.22)
-      activesupport (= 3.2.22)
-      arel (~> 3.0.2)
-      tzinfo (~> 0.3.29)
-    activeresource (3.2.22)
-      activemodel (= 3.2.22)
-      activesupport (= 3.2.22)
-    activesupport (3.2.22)
-      i18n (~> 0.6, >= 0.6.4)
-      multi_json (~> 1.0)
+    actioncable (5.1.1)
+      actionpack (= 5.1.1)
+      nio4r (~> 2.0)
+      websocket-driver (~> 0.6.1)
+    actionmailer (5.1.1)
+      actionpack (= 5.1.1)
+      actionview (= 5.1.1)
+      activejob (= 5.1.1)
+      mail (~> 2.5, >= 2.5.4)
+      rails-dom-testing (~> 2.0)
+    actionpack (5.1.1)
+      actionview (= 5.1.1)
+      activesupport (= 5.1.1)
+      rack (~> 2.0)
+      rack-test (~> 0.6.3)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.0, >= 1.0.2)
+    actionview (5.1.1)
+      activesupport (= 5.1.1)
+      builder (~> 3.1)
+      erubi (~> 1.4)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.0, >= 1.0.3)
+    activejob (5.1.1)
+      activesupport (= 5.1.1)
+      globalid (>= 0.3.6)
+    activemodel (5.1.1)
+      activesupport (= 5.1.1)
+    activerecord (5.1.1)
+      activemodel (= 5.1.1)
+      activesupport (= 5.1.1)
+      arel (~> 8.0)
+    activesupport (5.1.1)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (~> 0.7)
+      minitest (~> 5.1)
+      tzinfo (~> 1.1)
     addressable (2.4.0)
-    arel (3.0.3)
-    builder (3.0.4)
+    arel (8.0.0)
+    builder (3.2.3)
     capybara (2.10.1)
       addressable
       mime-types (>= 1.16)
@@ -61,55 +72,65 @@ GEM
     capybara-webkit (1.1.0)
       capybara (~> 2.0, >= 2.0.2)
       json
+    concurrent-ruby (1.0.5)
     diff-lcs (1.2.5)
-    erubis (2.7.0)
+    erubi (1.6.0)
     execjs (2.7.0)
     generator_spec (0.9.3)
       activesupport (>= 3.0.0)
       railties (>= 3.0.0)
-    hike (1.2.3)
-    i18n (0.7.0)
-    journey (1.0.4)
-    json (1.8.3)
-    json-schema (2.7.0)
+    globalid (0.4.0)
+      activesupport (>= 4.2.0)
+    i18n (0.8.1)
+    json (1.8.6)
+    json-schema (2.8.0)
       addressable (>= 2.4)
     libv8 (3.16.14.15)
-    mail (2.5.4)
-      mime-types (~> 1.16)
-      treetop (~> 1.4.8)
-    mime-types (1.25.1)
+    loofah (2.0.3)
+      nokogiri (>= 1.5.9)
+    mail (2.6.5)
+      mime-types (>= 1.16, < 4)
+    method_source (0.8.2)
+    mime-types (3.1)
+      mime-types-data (~> 3.2015)
+    mime-types-data (3.2016.0521)
     mini_portile2 (2.1.0)
-    multi_json (1.12.1)
+    minitest (5.10.2)
+    nio4r (2.0.0)
     nokogiri (1.6.8.1)
       mini_portile2 (~> 2.1.0)
-    polyglot (0.3.5)
     power_assert (0.3.1)
-    rack (1.4.7)
-    rack-cache (1.6.1)
-      rack (>= 0.4)
-    rack-ssl (1.3.4)
-      rack
+    rack (2.0.3)
     rack-test (0.6.3)
       rack (>= 1.0)
-    rails (3.2.22)
-      actionmailer (= 3.2.22)
-      actionpack (= 3.2.22)
-      activerecord (= 3.2.22)
-      activeresource (= 3.2.22)
-      activesupport (= 3.2.22)
-      bundler (~> 1.0)
-      railties (= 3.2.22)
-    railties (3.2.22)
-      actionpack (= 3.2.22)
-      activesupport (= 3.2.22)
-      rack-ssl (~> 1.3.2)
+    rails (5.1.1)
+      actioncable (= 5.1.1)
+      actionmailer (= 5.1.1)
+      actionpack (= 5.1.1)
+      actionview (= 5.1.1)
+      activejob (= 5.1.1)
+      activemodel (= 5.1.1)
+      activerecord (= 5.1.1)
+      activesupport (= 5.1.1)
+      bundler (>= 1.3.0, < 2.0)
+      railties (= 5.1.1)
+      sprockets-rails (>= 2.0.0)
+    rails-dom-testing (2.0.3)
+      activesupport (>= 4.2.0)
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.0.3)
+      loofah (~> 2.0)
+    railties (5.1.1)
+      actionpack (= 5.1.1)
+      activesupport (= 5.1.1)
+      method_source
       rake (>= 0.8.7)
-      rdoc (~> 3.4)
-      thor (>= 0.14.6, < 2.0)
-    rake (11.3.0)
-    rdoc (3.12.2)
-      json (~> 1.4)
+      thor (>= 0.18.1, < 2.0)
+    rake (12.0.0)
     ref (2.0.0)
+    responders (2.4.0)
+      actionpack (>= 4.2.0, < 5.3)
+      railties (>= 4.2.0, < 5.3)
     rspec-core (3.5.4)
       rspec-support (~> 3.5.0)
     rspec-expectations (3.5.0)
@@ -127,30 +148,28 @@ GEM
       rspec-mocks (~> 3.5.0)
       rspec-support (~> 3.5.0)
     rspec-support (3.5.0)
-    sprockets (2.2.3)
-      hike (~> 1.2)
-      multi_json (~> 1.0)
-      rack (~> 1.0)
-      tilt (~> 1.1, != 1.3.0)
+    sprockets (3.7.1)
+      concurrent-ruby (~> 1.0)
+      rack (> 1, < 3)
+    sprockets-rails (3.2.0)
+      actionpack (>= 4.0)
+      activesupport (>= 4.0)
+      sprockets (>= 3.0.0)
     sqlite3 (1.3.12)
-    strong_parameters (0.2.3)
-      actionpack (~> 3.0)
-      activemodel (~> 3.0)
-      activesupport (~> 3.0)
-      railties (~> 3.0)
     test-unit (3.2.1)
       power_assert
     therubyracer (0.12.2)
       libv8 (~> 3.16.14.0)
       ref
-    thor (0.19.1)
-    tilt (1.4.1)
-    treetop (1.4.15)
-      polyglot
-      polyglot (>= 0.3.1)
-    tzinfo (0.3.51)
+    thor (0.19.4)
+    thread_safe (0.3.6)
+    tzinfo (1.2.3)
+      thread_safe (~> 0.1)
     uglifier (3.0.2)
       execjs (>= 0.3.0, < 3)
+    websocket-driver (0.6.5)
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.2)
     xpath (2.0.0)
       nokogiri (~> 1.3)
 
@@ -161,13 +180,16 @@ DEPENDENCIES
   capybara
   capybara-webkit
   generator_spec
-  rails (= 3.2.22)
+  rails (= 5.1.1)
+  responders
   rspec-rails
   rswag-api!
   rswag-specs!
   rswag-ui!
   sqlite3
-  strong_parameters
   test-unit
   therubyracer
   uglifier
+
+BUNDLED WITH
+   1.14.6
diff --git a/README.md b/README.md
index 228168c..237e976 100644
--- a/README.md
+++ b/README.md
@@ -103,6 +103,17 @@ If you've used [Swagger](http://swagger.io/specification) before, then the synta
 
 Take special note of the __run_test!__ method that's called within each response block. This tells rswag to create and execute a corresponding example. It builds and submits a request based on parameter descriptions and corresponding values that have been provided using the rspec "let" syntax. For example, the "post" description in the example above specifies a "body" parameter called "blog". It also lists 2 different responses. For the success case (i.e. the 201 response), notice how "let" is used to set the blog parameter to a value that matches the provided schema. For the failure case (i.e. the 422 response), notice how it's set to a value that does not match the provided schema. When the test is executed, rswag also validates the actual response code and, where applicable, the response body against the provided [JSON Schema](http://json-schema.org/documentation.html).
 
+If you want to do additional validation on the response, pass a block to the __run_test!__ method:
+
+```ruby
+response '201', 'blog created' do
+  run_test! do |response|
+    data = JSON.parse(response.body)
+    expect(data['title']).to eq('foo')
+  end
+end
+```
+
 If you'd like your specs to be a little more explicit about what's going on here, you can replace the call to __run_test!__ with equivalent "before" and "it" blocks:
 
 ```ruby
diff --git a/rswag-api/lib/rswag/api/version.rb b/rswag-api/lib/rswag/api/version.rb
index 95b49f0..ca2a0e8 100644
--- a/rswag-api/lib/rswag/api/version.rb
+++ b/rswag-api/lib/rswag/api/version.rb
@@ -1,5 +1,5 @@
 module Rswag
   module Api
-    VERSION = '1.2.0'
+    VERSION = '1.2.1'
   end
 end
diff --git a/rswag-api/rswag-api.gemspec b/rswag-api/rswag-api.gemspec
index 5275ea2..19ba7f0 100644
--- a/rswag-api/rswag-api.gemspec
+++ b/rswag-api/rswag-api.gemspec
@@ -14,7 +14,7 @@ Gem::Specification.new do |s|
   s.description = "Open up your API to the phenomenal Swagger ecosystem by exposing Swagger files, that describe your service, as JSON endpoints"
   s.license     = "MIT"
 
-  s.files = Dir["{lib}/**/*"] + ["MIT-LICENSE", "Rakefile" ]
+  s.files = Dir["{lib}/**/*"] + ["MIT-LICENSE", "Rakefile"]
 
-  s.add_dependency "rails", ">= 3.1", "< 5.1" 
+  s.add_dependency "rails", ">= 3.1", "< 5.2"
 end
diff --git a/rswag-specs/lib/rswag/specs/example_group_helpers.rb b/rswag-specs/lib/rswag/specs/example_group_helpers.rb
index cb96e71..ed7b20f 100644
--- a/rswag-specs/lib/rswag/specs/example_group_helpers.rb
+++ b/rswag-specs/lib/rswag/specs/example_group_helpers.rb
@@ -69,7 +69,7 @@ module Rswag
         metadata[:response][:examples] = example
       end
 
-      def run_test!
+      def run_test!(&block)
         # NOTE: rspec 2.x support
         if RSPEC_VERSION < 3
           before do
@@ -77,7 +77,7 @@ module Rswag
           end
 
           it "returns a #{metadata[:response][:code]} response" do
-            assert_response_matches_metadata(example.metadata)
+            assert_response_matches_metadata(example.metadata, &block)
           end
         else
           before do |example|
@@ -85,7 +85,7 @@ module Rswag
           end
 
           it "returns a #{metadata[:response][:code]} response" do |example|
-            assert_response_matches_metadata(example.metadata)
+            assert_response_matches_metadata(example.metadata, &block)
           end
         end
       end
diff --git a/rswag-specs/lib/rswag/specs/example_helpers.rb b/rswag-specs/lib/rswag/specs/example_helpers.rb
index b9850ce..b7185fb 100644
--- a/rswag-specs/lib/rswag/specs/example_helpers.rb
+++ b/rswag-specs/lib/rswag/specs/example_helpers.rb
@@ -28,10 +28,10 @@ module Rswag
         end
       end
 
-      def assert_response_matches_metadata(api_metadata)
+      def assert_response_matches_metadata(api_metadata, &block)
         global_metadata = rswag_config.get_swagger_doc(api_metadata[:swagger_doc])
         validator = ResponseValidator.new(api_metadata, global_metadata)
-        validator.validate!(response)
+        validator.validate!(response, &block)
       end
 
       private
diff --git a/rswag-specs/lib/rswag/specs/extended_schema.rb b/rswag-specs/lib/rswag/specs/extended_schema.rb
index 493a27a..62eb4ee 100644
--- a/rswag-specs/lib/rswag/specs/extended_schema.rb
+++ b/rswag-specs/lib/rswag/specs/extended_schema.rb
@@ -3,6 +3,7 @@ require 'json-schema'
 module Rswag
   module Specs
     class ExtendedSchema < JSON::Schema::Draft4
+      
       def initialize
         super
         @attributes['type'] = ExtendedTypeAttribute
@@ -12,6 +13,7 @@ module Rswag
     end
 
     class ExtendedTypeAttribute < JSON::Schema::TypeV4Attribute
+      
       def self.validate(current_schema, data, fragments, processor, validator, options={})
         return if data.nil? && current_schema.schema['x-nullable'] == true
         super
diff --git a/rswag-specs/lib/rswag/specs/response_validator.rb b/rswag-specs/lib/rswag/specs/response_validator.rb
index 7212a3f..7194953 100644
--- a/rswag-specs/lib/rswag/specs/response_validator.rb
+++ b/rswag-specs/lib/rswag/specs/response_validator.rb
@@ -1,5 +1,6 @@
 require 'active_support/core_ext/hash/slice'
 require 'json-schema'
+require 'json'
 require 'rswag/specs/extended_schema'
 
 module Rswag
@@ -11,10 +12,11 @@ module Rswag
         @global_metadata = global_metadata
       end
 
-      def validate!(response)
+      def validate!(response, &block)
         validate_code!(response.code)
         validate_headers!(response.headers)
-        validate_body!(response.body)
+        validate_body!(response.body, &block)
+        block.call(response) if block_given?
       end
 
       private
diff --git a/rswag-specs/lib/rswag/specs/version.rb b/rswag-specs/lib/rswag/specs/version.rb
index ab6aa48..fe728f1 100644
--- a/rswag-specs/lib/rswag/specs/version.rb
+++ b/rswag-specs/lib/rswag/specs/version.rb
@@ -1,5 +1,5 @@
 module Rswag
   module Specs
-    VERSION = '1.2.0'
+    VERSION = '1.2.1'
   end
 end
diff --git a/rswag-specs/rswag-specs.gemspec b/rswag-specs/rswag-specs.gemspec
index 6bfd38b..17daaab 100644
--- a/rswag-specs/rswag-specs.gemspec
+++ b/rswag-specs/rswag-specs.gemspec
@@ -16,7 +16,8 @@ Gem::Specification.new do |s|
 
   s.files = Dir["{lib}/**/*"] + ["MIT-LICENSE", "Rakefile" ]
 
-  s.add_dependency "rails", ">= 3.1", "< 5.1" 
+  s.add_dependency "rails", ">= 3.1", "< 5.2"
+  s.add_dependency 'json', '~> 1.8'
   s.add_dependency 'json-schema', '~> 2.2'
   s.add_dependency 'rspec-rails', '>= 2.14', '< 4'
 end
diff --git a/rswag-specs/spec/rswag/specs/response_validator_spec.rb b/rswag-specs/spec/rswag/specs/response_validator_spec.rb
index 286940d..cb95996 100644
--- a/rswag-specs/spec/rswag/specs/response_validator_spec.rb
+++ b/rswag-specs/spec/rswag/specs/response_validator_spec.rb
@@ -29,7 +29,7 @@ module Rswag
             api_metadata[:response][:schema] = {
               type: 'object',
               properties: { text: { type: 'string' } },
-              required: [ 'text' ]
+              required: ['text']
             }
           end
 
@@ -42,6 +42,25 @@ module Rswag
             let(:response) { OpenStruct.new(code: 200, body: "{\"foo\":\"Some comment\"}") }
             it { expect { call }.to raise_error UnexpectedResponse }
           end
+
+          context "'block' provided" do
+            let(:call) do
+              subject.validate!(response) do |response|
+                data = JSON.parse(response.body)
+                expect(data['text']).to eq('Some comment')
+              end
+            end
+
+            context 'the block validation passes' do
+              let(:response) { OpenStruct.new(code: 200, body: "{\"text\":\"Some comment\"}") }
+              it { expect { call }.to_not raise_error }
+            end
+
+            context 'the block validation fails' do
+              let(:response) { OpenStruct.new(code: 200, body: "{\"text\":\"Some other comment\"}") }
+              it { expect { call }.to raise_error(RSpec::Expectations::ExpectationNotMetError) }
+            end
+          end
         end
 
         context "referenced 'schema' provided" do
@@ -51,7 +70,7 @@ module Rswag
               author: {
                 type: 'object',
                 properties: { name: { type: 'string' } },
-                required: [ 'name' ]
+                required: ['name']
               }
             }
           end
diff --git a/rswag-ui/lib/rswag/ui/engine.rb b/rswag-ui/lib/rswag/ui/engine.rb
index 9e35902..f9e2460 100644
--- a/rswag-ui/lib/rswag/ui/engine.rb
+++ b/rswag-ui/lib/rswag/ui/engine.rb
@@ -5,7 +5,14 @@ module Rswag
 
       initializer 'rswag-ui.initialize' do |app|
         if app.config.respond_to?(:assets)
-          app.config.assets.precompile += [ 'swagger-ui/*' ]
+          app.config.assets.precompile += [
+            'swagger-ui/css/*',
+            'swagger-ui/fonts/*',
+            'swagger-ui/images/*',
+            'swagger-ui/lang/*',
+            'swagger-ui/lib/*',
+            'swagger-ui/swagger-ui.min.js'
+          ]
         end
       end
     end
diff --git a/rswag-ui/lib/rswag/ui/version.rb b/rswag-ui/lib/rswag/ui/version.rb
index 29631fb..9079487 100644
--- a/rswag-ui/lib/rswag/ui/version.rb
+++ b/rswag-ui/lib/rswag/ui/version.rb
@@ -1,5 +1,5 @@
 module Rswag
   module Ui
-    VERSION = '1.2.0'
+    VERSION = '1.2.1'
   end
 end
diff --git a/rswag-ui/rswag-ui.gemspec b/rswag-ui/rswag-ui.gemspec
index 2634542..edbbf82 100644
--- a/rswag-ui/rswag-ui.gemspec
+++ b/rswag-ui/rswag-ui.gemspec
@@ -16,5 +16,5 @@ Gem::Specification.new do |s|
 
   s.files = Dir["{app,config,lib,vendor}/**/*"] + ["MIT-LICENSE", "Rakefile" ]
 
-  s.add_dependency "rails", ">= 3.1", "< 5.1" 
+  s.add_dependency "rails", ">= 3.1", "< 5.2" 
 end
diff --git a/rswag/lib/rswag/version.rb b/rswag/lib/rswag/version.rb
index dcd66b1..19b73a9 100644
--- a/rswag/lib/rswag/version.rb
+++ b/rswag/lib/rswag/version.rb
@@ -1,3 +1,3 @@
 module Rswag
-  VERSION = '1.2.0'
+  VERSION = '1.2.1'
 end
diff --git a/test-app/app/models/blog.rb b/test-app/app/models/blog.rb
index 51b0795..e913dba 100644
--- a/test-app/app/models/blog.rb
+++ b/test-app/app/models/blog.rb
@@ -5,7 +5,7 @@ class Blog < ActiveRecord::Base
     {
       id: id,
       title: title,
-      content: content
+      content: nil
     }
   end
 end
diff --git a/test-app/config/environments/development.rb b/test-app/config/environments/development.rb
index 7886e90..9bcfc66 100644
--- a/test-app/config/environments/development.rb
+++ b/test-app/config/environments/development.rb
@@ -28,4 +28,6 @@ TestApp::Application.configure do
 
   # Expands the lines which load the assets
   config.assets.debug = true
+
+  config.eager_load = false
 end
diff --git a/test-app/config/environments/production.rb b/test-app/config/environments/production.rb
deleted file mode 100644
index a9a5401..0000000
--- a/test-app/config/environments/production.rb
+++ /dev/null
@@ -1,67 +0,0 @@
-TestApp::Application.configure do
-  # Settings specified here will take precedence over those in config/application.rb
-
-  # Code is not reloaded between requests
-  config.cache_classes = true
-
-  # Full error reports are disabled and caching is turned on
-  config.consider_all_requests_local       = false
-  config.action_controller.perform_caching = true
-
-  # Disable Rails's static asset server (Apache or nginx will already do this)
-  config.serve_static_assets = true
-
-  # Compress JavaScripts and CSS
-  config.assets.compress = true
-
-  # Don't fallback to assets pipeline if a precompiled asset is missed
-  config.assets.compile = false
-
-  # Generate digests for assets URLs
-  config.assets.digest = true
-
-  # Defaults to nil and saved in location specified by config.assets.prefix
-  # config.assets.manifest = YOUR_PATH
-
-  # Specifies the header that your server uses for sending files
-  # config.action_dispatch.x_sendfile_header = "X-Sendfile" # for apache
-  # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for nginx
-
-  # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
-  # config.force_ssl = true
-
-  # See everything in the log (default is :info)
-  # config.log_level = :debug
-
-  # Prepend all log lines with the following tags
-  # config.log_tags = [ :subdomain, :uuid ]
-
-  # Use a different logger for distributed setups
-  # config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)
-
-  # Use a different cache store in production
-  # config.cache_store = :mem_cache_store
-
-  # Enable serving of images, stylesheets, and JavaScripts from an asset server
-  # config.action_controller.asset_host = "http://assets.example.com"
-
-  # Precompile additional assets (application.js, application.css, and all non-JS/CSS are already added)
-  # config.assets.precompile += %w( search.js )
-
-  # Disable delivery errors, bad email addresses will be ignored
-  # config.action_mailer.raise_delivery_errors = false
-
-  # Enable threaded mode
-  # config.threadsafe!
-
-  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
-  # the I18n.default_locale when a translation can not be found)
-  config.i18n.fallbacks = true
-
-  # Send deprecation notices to registered listeners
-  config.active_support.deprecation = :notify
-
-  # Log the query plan for queries taking more than this (works
-  # with SQLite, MySQL, and PostgreSQL)
-  # config.active_record.auto_explain_threshold_in_seconds = 0.5
-end
diff --git a/test-app/config/environments/test.rb b/test-app/config/environments/test.rb
index 6dd0bf7..3a35ac5 100644
--- a/test-app/config/environments/test.rb
+++ b/test-app/config/environments/test.rb
@@ -32,4 +32,6 @@ TestApp::Application.configure do
 
   # Print deprecation notices to the stderr
   config.active_support.deprecation = :stderr
+
+  config.eager_load = false
 end
diff --git a/test-app/config/initializers/secret_token.rb b/test-app/config/initializers/secret_token.rb
index 706e45d..843ff63 100644
--- a/test-app/config/initializers/secret_token.rb
+++ b/test-app/config/initializers/secret_token.rb
@@ -5,3 +5,6 @@
 # Make sure the secret is at least 30 characters and all random,
 # no regular words or you'll be exposed to dictionary attacks.
 TestApp::Application.config.secret_token = '60f36cd33756d73f362053f1d45256ae50d75440b634ae73b070a6e35a2df38692f59e28e5ecbd1f9f2e850255f6d29a468bc59ac4484c2b7f0548ddbfc1b870'
+
+# See http://guides.rubyonrails.org/upgrading_ruby_on_rails.html#config-secrets-yml
+TestApp::Application.config.secret_key_base = 'f6a820cc8aa76094583cd68ef46a735e25e3278648086355f8bd24721f036959c728c06a28dcecfe695f17ae2db44dfa1424f22b81377f2a1496d4e19f6f7faa'
diff --git a/test-app/db/migrate/20160218212104_create_blogs.rb b/test-app/db/migrate/20160218212104_create_blogs.rb
index 81d9813..03e1463 100644
--- a/test-app/db/migrate/20160218212104_create_blogs.rb
+++ b/test-app/db/migrate/20160218212104_create_blogs.rb
@@ -1,4 +1,10 @@
-class CreateBlogs < ActiveRecord::Migration
+migration_class = if Gem::Version.new(Rails.version) >= Gem::Version.new("5.0")
+                    ActiveRecord::Migration[4.2]
+                  else
+                    ActiveRecord::Migration
+                  end
+
+class CreateBlogs < migration_class
   def change
     create_table :blogs do |t|
       t.string :title
diff --git a/test-app/db/schema.rb b/test-app/db/schema.rb
index 082bb8d..cea4d93 100644
--- a/test-app/db/schema.rb
+++ b/test-app/db/schema.rb
@@ -1,4 +1,3 @@
-# encoding: UTF-8
 # This file is auto-generated from the current state of the database. Instead
 # of editing this file, please use the migrations feature of Active Record to
 # incrementally modify your database, and then regenerate this schema definition.
@@ -9,15 +8,15 @@
 # from scratch. The latter is a flawed and unsustainable approach (the more migrations
 # you'll amass, the slower it'll run and the greater likelihood for issues).
 #
-# It's strongly recommended to check this file into your version control system.
+# It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20160218212104) do
+ActiveRecord::Schema.define(version: 20160218212104) do
 
-  create_table "blogs", :force => true do |t|
-    t.string   "title"
-    t.text     "content"
-    t.datetime "created_at", :null => false
-    t.datetime "updated_at", :null => false
+  create_table "blogs", force: :cascade do |t|
+    t.string "title", limit: 255
+    t.text "content"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
   end
 
 end
diff --git a/test-app/spec/swagger_helper.rb b/test-app/spec/swagger_helper.rb
index a3b76b4..f3202ec 100644
--- a/test-app/spec/swagger_helper.rb
+++ b/test-app/spec/swagger_helper.rb
@@ -39,7 +39,7 @@ RSpec.configure do |config|
           properties: {
             id: { type: 'integer' },
             title: { type: 'string' },
-            content: { type: 'string' }
+            content: { type: 'string', 'x-nullable': true }
           },
           required: [ 'id', 'title', 'content' ]
         }
diff --git a/test-app/swagger/v1/swagger.json b/test-app/swagger/v1/swagger.json
index acbcd1e..7ee0753 100644
--- a/test-app/swagger/v1/swagger.json
+++ b/test-app/swagger/v1/swagger.json
@@ -146,7 +146,8 @@
           "type": "string"
         },
         "content": {
-          "type": "string"
+          "type": "string",
+          "x-nullable": true
         }
       },
       "required": [