diff --git a/docs/contributor-info/linters.md b/docs/contributor-info/linters.md
index 1d1cd33e5..d3ab130c1 100644
--- a/docs/contributor-info/linters.md
+++ b/docs/contributor-info/linters.md
@@ -3,7 +3,7 @@ These linters support the [ShakaCode Style Guidelines](./style.md)
 
 ## Autofix!
 
-If you haven't tried the autofix options for `jscs` and `rubocop`, you're seriously missing out!
+If you haven't tried the autofix options for `eslint` and `rubocop`, you're seriously missing out!
 
 1. Be **SURE** you have a clean git status, as you'll want to review what the autofix does to your code!
 2. **Rubocop:**  Be sure to be in the right directory where you have Ruby files, probably the top level of your Rails project.
@@ -11,9 +11,15 @@ If you haven't tried the autofix options for `jscs` and `rubocop`, you're seriou
   rubocop -a
   ```
 
-3. **JSCS:**: Be sure to be in the right directory where you have JS files.
+3. **eslint:**: Be sure to be in the right directory where you have JS files.
   ```
-  jscs -x .
+  eslint --fix .
+  ```
+  
+  or 
+  
+  ```
+  npm run lint -- --fix
   ```
 
 Autofixing is a **HUGE** time saver!
@@ -60,5 +66,4 @@ You can disable all rules for a line or block, or only specific rules, as shown
 * [ESLint quick start](http://untilfalse.com/eslint-quick-start/)
 * [RuboCop](https://github.com/bbatsov/rubocop)
 * [ESLint](http://eslint.org/)
-* [JSCS](https://github.com/jscs-dev/node-jscs)
 
diff --git a/docs/misc/doctrine.md b/docs/misc/doctrine.md
index fc359f055..56dc52747 100644
--- a/docs/misc/doctrine.md
+++ b/docs/misc/doctrine.md
@@ -44,7 +44,7 @@ Here's the chef's selection from the React on Rails community:
 
 ### JavaScript Tooling
 * [Babel](https://babeljs.io/): Transpiler for ES6 into ES5 and much more.
-* [EsLint](http://eslint.org/) and [Jsrc](http://jscs.info/): JavaScript linters.
+* [EsLint](http://eslint.org/)
 * [Webpack](http://webpack.github.io/): Generator of deployment assets and provider of hot module reloading.
 
 By having a common set of tools, we can discuss what we should or shouldn't be using. Thus, this takes out the "JavaScript Fatigue" from having too many unclear choices in the JavaScript world.
diff --git a/lib/react_on_rails/assets_precompile.rb b/lib/react_on_rails/assets_precompile.rb
index a98d1000d..ec993ee55 100644
--- a/lib/react_on_rails/assets_precompile.rb
+++ b/lib/react_on_rails/assets_precompile.rb
@@ -69,7 +69,8 @@ def symlink_non_digested_assets
       manifest_path = manifest_glob.first
       manifest_file = File.new(manifest_path)
       manifest_data = if File.extname(manifest_file) == ".json"
-                        JSON.load(manifest_file)["assets"]
+                        manifest_file_data = File.read(manifest_path)
+                        JSON.parse(manifest_file_data)["assets"]
                       else
                         YAML.load(manifest_file)
                       end
diff --git a/lib/react_on_rails/configuration.rb b/lib/react_on_rails/configuration.rb
index 6c60b3eb5..a967038ee 100644
--- a/lib/react_on_rails/configuration.rb
+++ b/lib/react_on_rails/configuration.rb
@@ -7,35 +7,48 @@ def self.configure
   DEFAULT_GENERATED_ASSETS_DIR = File.join(%w(app assets webpack)).freeze
 
   def self.setup_config_values
-    if @configuration.webpack_generated_files.empty?
-      files = ["webpack-bundle.js"]
-      if @configuration.server_bundle_js_file.present?
-        files << @configuration.server_bundle_js_file
-      end
-      @configuration.webpack_generated_files = files
-    end
+    ensure_webpack_generated_files_exists
+    configure_generated_assets_dirs_deprecation
+    ensure_generated_assets_dir_present
+    ensure_server_bundle_js_file_has_no_path
+  end
 
-    if @configuration.generated_assets_dirs.present?
-      puts "[DEPRECATION] ReactOnRails: Use config.generated_assets_dir rather than "\
+  def self.ensure_generated_assets_dir_present
+    return unless @configuration.generated_assets_dir.blank?
+
+    @configuration.generated_assets_dir = DEFAULT_GENERATED_ASSETS_DIR
+    puts "ReactOnRails: Set generated_assets_dir to default: #{DEFAULT_GENERATED_ASSETS_DIR}"
+  end
+
+  def self.configure_generated_assets_dirs_deprecation
+    return unless @configuration.generated_assets_dirs.present?
+
+    puts "[DEPRECATION] ReactOnRails: Use config.generated_assets_dir rather than "\
         "generated_assets_dirs"
-      if @configuration.generated_assets_dir.blank?
-        @configuration.generated_assets_dir = @configuration.generated_assets_dirs
-      else
-        puts "[DEPRECATION] ReactOnRails. You have both generated_assets_dirs and "\
+    if @configuration.generated_assets_dir.blank?
+      @configuration.generated_assets_dir = @configuration.generated_assets_dirs
+    else
+      puts "[DEPRECATION] ReactOnRails. You have both generated_assets_dirs and "\
           "generated_assets_dir defined. Define ONLY generated_assets_dir"
-      end
     end
+  end
 
-    if @configuration.generated_assets_dir.blank?
-      @configuration.generated_assets_dir = DEFAULT_GENERATED_ASSETS_DIR
-      puts "ReactOnRails: Set generated_assets_dir to default: #{DEFAULT_GENERATED_ASSETS_DIR}"
+  def self.ensure_webpack_generated_files_exists
+    return unless @configuration.webpack_generated_files.empty?
+
+    files = ["webpack-bundle.js"]
+    if @configuration.server_bundle_js_file.present?
+      files << @configuration.server_bundle_js_file
     end
+    @configuration.webpack_generated_files = files
+  end
+
+  def self.ensure_server_bundle_js_file_has_no_path
+    return unless @configuration.server_bundle_js_file.include?(File::SEPARATOR)
 
-    if @configuration.server_bundle_js_file.include?(File::SEPARATOR)
-      puts "[DEPRECATION] ReactOnRails: remove path from server_bundle_js_file in configuration. "\
+    puts "[DEPRECATION] ReactOnRails: remove path from server_bundle_js_file in configuration. "\
         "All generated files must go in #{@configuration.generated_assets_dir}"
-      @configuration.server_bundle_js_file = File.basename(@configuration.server_bundle_js_file)
-    end
+    @configuration.server_bundle_js_file = File.basename(@configuration.server_bundle_js_file)
   end
 
   def self.configuration
diff --git a/lib/react_on_rails/test_helper/node_process_launcher.rb b/lib/react_on_rails/test_helper/node_process_launcher.rb
index 96a33f4e3..d1c2c91be 100644
--- a/lib/react_on_rails/test_helper/node_process_launcher.rb
+++ b/lib/react_on_rails/test_helper/node_process_launcher.rb
@@ -1,12 +1,12 @@
 module ReactOnRails
   module TestHelper
     def self.launch_node
-      if ReactOnRails.configuration.server_render_method == "NodeJS"
-        path = "#{::Rails.root}/client/node"
-        puts "Launching NodeJS server at #{path}"
-        system("cd #{path} && npm start &")
-        sleep(1)
-      end
+      return unless ReactOnRails.configuration.server_render_method == "NodeJS"
+
+      path = "#{::Rails.root}/client/node"
+      puts "Launching NodeJS server at #{path}"
+      system("cd #{path} && npm start &")
+      sleep(1)
     end
   end
 end
diff --git a/node_package/src/Authenticity.js b/node_package/src/Authenticity.js
index 6106c863b..6d26960b0 100644
--- a/node_package/src/Authenticity.js
+++ b/node_package/src/Authenticity.js
@@ -3,8 +3,11 @@
 export default {
 
   authenticityToken() {
-    const token: {content?: string} = document.querySelector('meta[name="csrf-token"]');
-    return token ? token.content : null;
+    const token: ?HTMLElement = document.querySelector('meta[name="csrf-token"]');
+    if (token && (token instanceof window.HTMLMetaElement)) {
+      return token.content;
+    }
+    return null;
   },
 
   authenticityHeaders(otherHeaders: {[id:string]: string} = {}) {
diff --git a/node_package/tests/ComponentRegistry.test.js b/node_package/tests/ComponentRegistry.test.js
index d904a5e9d..869a70325 100644
--- a/node_package/tests/ComponentRegistry.test.js
+++ b/node_package/tests/ComponentRegistry.test.js
@@ -3,6 +3,7 @@
 /* eslint-disable react/prefer-stateless-function */
 /* eslint-disable react/jsx-filename-extension */
 /* eslint-disable no-unused-vars */
+/* eslint-disable import/extensions */
 
 import test from 'tape';
 import React from 'react';
diff --git a/node_package/tests/buildConsoleReplay.test.js b/node_package/tests/buildConsoleReplay.test.js
index f58daf7e4..374ff6f8b 100644
--- a/node_package/tests/buildConsoleReplay.test.js
+++ b/node_package/tests/buildConsoleReplay.test.js
@@ -84,14 +84,11 @@ test('buildConsoleReplay wraps console replay in a script tag', (assert) => {
   ];
   const actual = buildConsoleReplay();
 
-  // https://github.com/jscs-dev/node-jscs/issues/2137
-  // jscs:disable disallowSpacesInsideTemplateStringPlaceholders
   const expected = `
 <script>
 console.log.apply(console, ["some message","{\\"a\\":1,\\"b\\":2}"]);
 console.warn.apply(console, ["other message","{\\"c\\":3,\\"d\\":4}"]);
 </script>`;
 
-  // jscs:enable disallowSpacesInsideTemplateStringPlaceholders
   assert.equals(actual, expected, 'Unexpected value for console replay history');
 });
diff --git a/package.json b/package.json
index 9dbfb7c62..88af3d81f 100644
--- a/package.json
+++ b/package.json
@@ -7,35 +7,35 @@
     "doc": "docs"
   },
   "devDependencies": {
-    "babel-cli": "^6.16.0",
-    "babel-core": "^6.17.0",
-    "babel-loader": "^6.2.5",
+    "babel-cli": "^6.18.0",
+    "babel-core": "^6.21.0",
+    "babel-loader": "^6.2.10",
     "babel-plugin-react-transform": "^2.0.2",
-    "babel-plugin-transform-flow-strip-types": "^6.14.0",
+    "babel-plugin-transform-flow-strip-types": "^6.21.0",
     "babel-plugin-transform-runtime": "^6.15.0",
-    "babel-preset-es2015": "^6.16.0",
+    "babel-preset-es2015": "^6.18.0",
     "babel-preset-react": "^6.16.0",
     "babel-preset-stage-0": "^6.16.0",
-    "babel-runtime": "^6.11.6",
+    "babel-runtime": "^6.20.0",
     "babel-tape-runner": "^2.0.1",
-    "babel-types": "^6.16.0",
+    "babel-types": "^6.21.0",
     "babelify": "^7.3.0",
     "blue-tape": "^1.0.0",
-    "eslint": "^3.8.1",
-    "eslint-config-shakacode": "^13.2.0-beta.1",
-    "eslint-plugin-import": "^2.0.1",
+    "eslint": "^3.12.2",
+    "eslint-config-shakacode": "^13.2.1",
+    "eslint-plugin-import": "^2.2.0",
     "eslint-plugin-jsx-a11y": "^2.2.3",
-    "eslint-plugin-react": "^6.4.1",
-    "flow-bin": "^0.36.0",
-    "jsdom": "^9.8.0",
-    "react": "^15.3.2",
-    "react-dom": "^15.3.2",
+    "eslint-plugin-react": "^6.8.0",
+    "flow-bin": "^0.37.4",
+    "jsdom": "^9.9.1",
+    "react": "^15.4.1",
+    "react-dom": "^15.4.1",
     "react-transform-hmr": "^1.0.4",
     "redux": "^3.6.0",
-    "release-it": "^2.4.3",
+    "release-it": "^2.5.2",
     "tap-spec": "^4.1.1",
-    "tape": "^4.6.2",
-    "webpack": "^1.13.2"
+    "tape": "^4.6.3",
+    "webpack": "^1.14.0"
   },
   "peerDependencies": {
     "react": ">= 0.14",
diff --git a/rakelib/docker.rake b/rakelib/docker.rake
index a370158ca..1ddedc185 100644
--- a/rakelib/docker.rake
+++ b/rakelib/docker.rake
@@ -19,10 +19,6 @@ namespace :docker do
     sh "docker-compose run lint rake lint:eslint"
   end
 
-  desc "Run jscs linter from docker"
-  task :jscs do
-    sh "docker-compose run lint rake lint:jscs"
-  end
   desc "Run all linting from docker"
   task :lint do
     sh "docker-compose run lint rake lint"
diff --git a/spec/dummy/Gemfile b/spec/dummy/Gemfile
index ca6ab9053..7081328cd 100644
--- a/spec/dummy/Gemfile
+++ b/spec/dummy/Gemfile
@@ -18,6 +18,8 @@ gem 'coffee-rails', '~> 4.1.0'
 # Use jquery as the JavaScript library
 gem 'jquery-rails'
 
+gem 'puma'
+
 # Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
 if ENV["DISABLE_TURBOLINKS"].nil? || ENV["DISABLE_TURBOLINKS"].strip.empty?
   if ENV["ENABLE_TURBOLINKS_5"].nil? || ENV["ENABLE_TURBOLINKS_5"].strip.empty?
diff --git a/spec/dummy/Gemfile.lock b/spec/dummy/Gemfile.lock
index bcf9db5a9..b77236312 100644
--- a/spec/dummy/Gemfile.lock
+++ b/spec/dummy/Gemfile.lock
@@ -47,16 +47,17 @@ GEM
       minitest (~> 5.1)
       thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
-    addressable (2.4.0)
+    addressable (2.5.0)
+      public_suffix (~> 2.0, >= 2.0.2)
     archive-zip (0.7.0)
       io-like (~> 0.3.0)
     arel (6.0.3)
-    ast (2.2.0)
-    awesome_print (1.6.1)
+    ast (2.3.0)
+    awesome_print (1.7.0)
     binding_of_caller (0.7.2)
       debug_inspector (>= 0.0.1)
     builder (3.2.2)
-    byebug (8.2.5)
+    byebug (9.0.6)
     capybara (2.7.1)
       addressable
       mime-types (>= 1.16)
@@ -64,7 +65,7 @@ GEM
       rack (>= 1.0.0)
       rack-test (>= 0.5.4)
       xpath (~> 2.0)
-    capybara-screenshot (1.0.12)
+    capybara-screenshot (1.0.14)
       capybara (>= 1.0, < 3)
       launchy
     capybara-webkit (1.11.1)
@@ -83,86 +84,85 @@ GEM
     coffee-script (2.4.1)
       coffee-script-source
       execjs
-    coffee-script-source (1.10.0)
-    concurrent-ruby (1.0.2)
+    coffee-script-source (1.12.2)
+    concurrent-ruby (1.0.3)
     connection_pool (2.2.1)
-    coveralls (0.8.13)
-      json (~> 1.8)
-      simplecov (~> 0.11.0)
+    coveralls (0.8.17)
+      json (>= 1.8, < 3)
+      simplecov (~> 0.12.0)
       term-ansicolor (~> 1.3)
       thor (~> 0.19.1)
-      tins (~> 1.6.0)
+      tins (~> 1.6)
     debug_inspector (0.0.2)
     diff-lcs (1.2.5)
     docile (1.1.5)
     erubis (2.7.0)
     execjs (2.7.0)
-    ffi (1.9.10)
+    ffi (1.9.14)
     foreman (0.82.0)
       thor (~> 0.19.1)
     generator_spec (0.9.3)
       activesupport (>= 3.0.0)
       railties (>= 3.0.0)
-    globalid (0.3.6)
+    globalid (0.3.7)
       activesupport (>= 4.1.0)
     i18n (0.7.0)
     interception (0.5)
     io-like (0.3.0)
-    jbuilder (2.4.1)
+    jbuilder (2.6.1)
       activesupport (>= 3.0.0, < 5.1)
       multi_json (~> 1.2)
-    jquery-rails (4.1.1)
+    jquery-rails (4.2.1)
       rails-dom-testing (>= 1, < 3)
       railties (>= 4.2.0)
       thor (>= 0.14, < 2.0)
     json (1.8.3)
     launchy (2.4.3)
       addressable (~> 2.3)
-    libv8 (5.0.71.48.3)
+    libv8 (5.3.332.38.3)
     loofah (2.0.3)
       nokogiri (>= 1.5.9)
     mail (2.6.4)
       mime-types (>= 1.16, < 4)
     method_source (0.8.2)
-    mime-types (3.0)
+    mime-types (3.1)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2016.0221)
+    mime-types-data (3.2016.0521)
     mini_portile2 (2.1.0)
-    mini_racer (0.1.4)
-      libv8 (~> 5.0, < 5.1.11)
-    minitest (5.9.0)
-    multi_json (1.12.0)
-    nokogiri (1.6.8)
+    mini_racer (0.1.7)
+      libv8 (~> 5.3)
+    minitest (5.10.1)
+    multi_json (1.12.1)
+    nokogiri (1.6.8.1)
       mini_portile2 (~> 2.1.0)
-      pkg-config (~> 1.1.7)
-    parser (2.3.1.0)
+    parser (2.3.3.1)
       ast (~> 2.2)
-    pkg-config (1.1.7)
-    poltergeist (1.9.0)
+    poltergeist (1.12.0)
       capybara (~> 2.1)
       cliver (~> 0.3.1)
-      multi_json (~> 1.0)
       websocket-driver (>= 0.2.0)
     powerpack (0.1.1)
-    pry (0.10.3)
+    pry (0.10.4)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
       slop (~> 3.4)
-    pry-byebug (3.3.0)
-      byebug (~> 8.0)
+    pry-byebug (3.4.2)
+      byebug (~> 9.0)
       pry (~> 0.10)
-    pry-doc (0.8.0)
+    pry-doc (0.9.0)
       pry (~> 0.9)
       yard (~> 0.8)
     pry-rails (0.3.4)
       pry (>= 0.9.10)
-    pry-rescue (1.4.2)
+    pry-rescue (1.4.4)
       interception (>= 0.5)
       pry
     pry-stack_explorer (0.4.9.2)
       binding_of_caller (>= 0.7)
       pry (>= 0.9.11)
-    rack (1.6.4)
+    public_suffix (2.0.4)
+    puma (3.6.2)
+    rack (1.6.5)
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.2.3)
@@ -190,95 +190,95 @@ GEM
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rainbow (2.1.0)
-    rake (11.2.2)
-    rdoc (4.2.2)
-      json (~> 1.4)
-    rspec-core (3.4.4)
-      rspec-support (~> 3.4.0)
-    rspec-expectations (3.4.0)
+    rake (12.0.0)
+    rdoc (4.3.0)
+    rspec-core (3.5.4)
+      rspec-support (~> 3.5.0)
+    rspec-expectations (3.5.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.4.0)
-    rspec-mocks (3.4.1)
+      rspec-support (~> 3.5.0)
+    rspec-mocks (3.5.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.4.0)
-    rspec-rails (3.4.2)
-      actionpack (>= 3.0, < 4.3)
-      activesupport (>= 3.0, < 4.3)
-      railties (>= 3.0, < 4.3)
-      rspec-core (~> 3.4.0)
-      rspec-expectations (~> 3.4.0)
-      rspec-mocks (~> 3.4.0)
-      rspec-support (~> 3.4.0)
+      rspec-support (~> 3.5.0)
+    rspec-rails (3.5.2)
+      actionpack (>= 3.0)
+      activesupport (>= 3.0)
+      railties (>= 3.0)
+      rspec-core (~> 3.5.0)
+      rspec-expectations (~> 3.5.0)
+      rspec-mocks (~> 3.5.0)
+      rspec-support (~> 3.5.0)
     rspec-retry (0.5.2)
       rspec-core (> 3.3, < 3.6)
-    rspec-support (3.4.1)
-    rubocop (0.42.0)
-      parser (>= 2.3.1.0, < 3.0)
+    rspec-support (3.5.0)
+    rubocop (0.46.0)
+      parser (>= 2.3.1.1, < 3.0)
       powerpack (~> 0.1)
       rainbow (>= 1.99.1, < 3.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
-    ruby-lint (2.1.0)
+    ruby-lint (2.3.1)
       parser (~> 2.2)
       slop (~> 3.4, >= 3.4.7)
-    ruby-progressbar (1.8.0)
+    ruby-progressbar (1.8.1)
     rubyzip (1.2.0)
-    sass (3.4.22)
-    sass-rails (5.0.4)
-      railties (>= 4.0.0, < 5.0)
+    sass (3.4.23)
+    sass-rails (5.0.6)
+      railties (>= 4.0.0, < 6)
       sass (~> 3.1)
       sprockets (>= 2.8, < 4.0)
       sprockets-rails (>= 2.0, < 4.0)
       tilt (>= 1.1, < 3)
-    scss_lint (0.48.0)
-      rake (>= 0.9, < 12)
-      sass (~> 3.4.15)
-    sdoc (0.4.1)
+    scss_lint (0.51.0)
+      rake (>= 0.9, < 13)
+      sass (~> 3.4.20)
+    sdoc (0.4.2)
       json (~> 1.7, >= 1.7.7)
       rdoc (~> 4.0)
-    selenium-webdriver (2.53.0)
+    selenium-webdriver (3.0.4)
       childprocess (~> 0.5)
       rubyzip (~> 1.0)
       websocket (~> 1.0)
-    simplecov (0.11.2)
+    simplecov (0.12.0)
       docile (~> 1.1.0)
-      json (~> 1.8)
+      json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.0)
     slop (3.6.0)
-    spring (1.7.1)
-    sprockets (3.6.0)
+    spring (2.0.0)
+      activesupport (>= 4.2)
+    sprockets (3.7.1)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    sprockets-rails (3.0.4)
+    sprockets-rails (3.2.0)
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
-    sqlite3 (1.3.11)
-    term-ansicolor (1.3.2)
+    sqlite3 (1.3.12)
+    term-ansicolor (1.4.0)
       tins (~> 1.0)
-    thor (0.19.1)
+    thor (0.19.4)
     thread_safe (0.3.5)
-    tilt (2.0.2)
-    tins (1.6.0)
+    tilt (2.0.5)
+    tins (1.13.0)
     turbolinks (2.5.3)
       coffee-rails
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
-    uglifier (3.0.0)
+    uglifier (3.0.4)
       execjs (>= 0.3.0, < 3)
-    unicode-display_width (1.0.5)
-    web-console (3.1.1)
+    unicode-display_width (1.1.2)
+    web-console (3.3.0)
       activemodel (>= 4.2)
       debug_inspector
       railties (>= 4.2)
     websocket (1.2.3)
-    websocket-driver (0.6.3)
+    websocket-driver (0.6.4)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.2)
     xpath (2.0.0)
       nokogiri (~> 1.3)
-    yard (0.8.7.6)
+    yard (0.9.5)
 
 PLATFORMS
   ruby
@@ -303,6 +303,7 @@ DEPENDENCIES
   pry-rails
   pry-rescue
   pry-stack_explorer
+  puma
   rails (= 4.2.3)
   react_on_rails!
   rspec-rails
diff --git a/spec/dummy/Procfile b/spec/dummy/Procfile
index 8687b0001..008ba4d87 100644
--- a/spec/dummy/Procfile
+++ b/spec/dummy/Procfile
@@ -1 +1 @@
-web: bundle exec puma -C config/puma.rb -b 0.0.0.0
+rails: REACT_ON_RAILS_ENV=HOT rails s -b 0.0.0.0
diff --git a/spec/dummy/client/.eslintrc b/spec/dummy/client/.eslintrc
index f29f04e9c..b9a5fce50 100644
--- a/spec/dummy/client/.eslintrc
+++ b/spec/dummy/client/.eslintrc
@@ -6,3 +6,4 @@ rules:
   no-console: 0
   import/no-unresolved: 0
   import/no-extraneous-dependencies: 0
+  react/forbid-prop-types: 0
diff --git a/spec/dummy/client/app/components/DeferredRender.jsx b/spec/dummy/client/app/components/DeferredRender.jsx
index a002fdb02..e77cb7484 100644
--- a/spec/dummy/client/app/components/DeferredRender.jsx
+++ b/spec/dummy/client/app/components/DeferredRender.jsx
@@ -5,20 +5,23 @@ const DeferredRender = ({ children }) => (
   <div>
     <h1>Deferred Rendering</h1>
     <p>
-      Here, we're testing async routes with server rendering.
+      Here, we&apos;re testing async routes with server rendering.
       By deferring the initial render, we can prevent a client/server
       checksum mismatch error.
     </p>
     {
-      children ? children : (
-        <p>
-          <Link to="/deferred_render_with_server_rendering/async_page">
-            Test Async Route
-          </Link>
-        </p>
-      )
+      children ||
+      <p>
+        <Link to="/deferred_render_with_server_rendering/async_page">
+          Test Async Route
+        </Link>
+      </p>
     }
   </div>
 );
 
+DeferredRender.propTypes = {
+  children: React.PropTypes.node,
+};
+
 export default DeferredRender;
diff --git a/spec/dummy/client/app/components/DeferredRenderAsyncPage.jsx b/spec/dummy/client/app/components/DeferredRenderAsyncPage.jsx
index afcd597f9..613220031 100644
--- a/spec/dummy/client/app/components/DeferredRenderAsyncPage.jsx
+++ b/spec/dummy/client/app/components/DeferredRenderAsyncPage.jsx
@@ -5,7 +5,7 @@ const DeferredRenderAsyncPage = () => (
     <p>Noice! It works.</p>
     <p>
       Now, try reloading this page and looking at the developer console.
-      There shouldn't be any client/server mismatch error from React.
+      There shouldn&apos;t be any client/server mismatch error from React.
     </p>
   </div>
 );
diff --git a/spec/dummy/client/app/components/HelloWorld.jsx b/spec/dummy/client/app/components/HelloWorld.jsx
index 1c82f33a5..3fbe99da7 100644
--- a/spec/dummy/client/app/components/HelloWorld.jsx
+++ b/spec/dummy/client/app/components/HelloWorld.jsx
@@ -12,8 +12,6 @@ class HelloWorld extends React.Component {
       name: PropTypes.string,
     }).isRequired,
     railsContext: PropTypes.object,
-
-    error: PropTypes.any,
   };
 
   // Not necessary if we only call super, but we'll need to initialize state, etc.
@@ -24,15 +22,15 @@ class HelloWorld extends React.Component {
     this.handleChange = this.handleChange.bind(this);
   }
 
+  setNameDomRef(nameDomNode) {
+    this.nameDomRef = nameDomNode;
+  }
+
   handleChange() {
     const name = this.nameDomRef.value;
     this.setState({ name });
   }
 
-  setNameDomRef(nameDomNode) {
-    this.nameDomRef = nameDomNode;
-  }
-
   render() {
     console.log('HelloWorld demonstrating a call to console.log in ' +
       'spec/dummy/client/app/components/HelloWorld.jsx:18');
diff --git a/spec/dummy/client/app/components/HelloWorldES5.jsx b/spec/dummy/client/app/components/HelloWorldES5.jsx
index 30934631b..faaca9944 100644
--- a/spec/dummy/client/app/components/HelloWorldES5.jsx
+++ b/spec/dummy/client/app/components/HelloWorldES5.jsx
@@ -12,15 +12,15 @@ const HelloWorldES5 = React.createClass({
     return this.props.helloWorldData;
   },
 
+  setNameDomRef(nameDomNode) {
+    this.nameDomRef = nameDomNode;
+  },
+
   handleChange() {
     const name = this.nameDomRef.value;
     this.setState({ name });
   },
 
-  setNameDomRef(nameDomNode) {
-    this.nameDomRef = nameDomNode;
-  },
-
   render() {
     const { name } = this.state;
 
diff --git a/spec/dummy/client/app/components/HelloWorldRedux.jsx b/spec/dummy/client/app/components/HelloWorldRedux.jsx
index 1f71c6ce3..18d92818e 100644
--- a/spec/dummy/client/app/components/HelloWorldRedux.jsx
+++ b/spec/dummy/client/app/components/HelloWorldRedux.jsx
@@ -17,15 +17,15 @@ export default class HelloWorldRedux extends React.Component {
     this.handleChange = this.handleChange.bind(this);
   }
 
+  setNameDomRef(nameDomNode) {
+    this.nameDomRef = nameDomNode;
+  }
+
   handleChange() {
     const name = this.nameDomRef.value;
     this.props.actions.updateName(name);
   }
 
-  setNameDomRef(nameDomNode) {
-    this.nameDomRef = nameDomNode;
-  }
-
   render() {
     const { data, railsContext } = this.props;
     const { name } = data;
diff --git a/spec/dummy/client/app/components/RailsContext.jsx b/spec/dummy/client/app/components/RailsContext.jsx
index 459631589..08ef05040 100644
--- a/spec/dummy/client/app/components/RailsContext.jsx
+++ b/spec/dummy/client/app/components/RailsContext.jsx
@@ -12,7 +12,7 @@ function renderContextRows(railsContext) {
             {key}:&nbsp;
           </strong></td>
           <td className={className}>{`${value}`}</td>
-        </tr>
+        </tr>,
       );
     }
   }, []);
diff --git a/spec/dummy/client/app/startup/ClientReduxApp.jsx b/spec/dummy/client/app/startup/ClientReduxApp.jsx
index c0418861b..3449fc077 100644
--- a/spec/dummy/client/app/startup/ClientReduxApp.jsx
+++ b/spec/dummy/client/app/startup/ClientReduxApp.jsx
@@ -32,5 +32,5 @@ export default (props, railsContext) => {
     <Provider store={store}>
       <HelloWorldContainer />
     </Provider>
-    );
+  );
 };
diff --git a/spec/dummy/client/app/startup/ClientReduxSharedStoreApp.jsx b/spec/dummy/client/app/startup/ClientReduxSharedStoreApp.jsx
index 8e83ed06b..0ec1ab01d 100644
--- a/spec/dummy/client/app/startup/ClientReduxSharedStoreApp.jsx
+++ b/spec/dummy/client/app/startup/ClientReduxSharedStoreApp.jsx
@@ -20,5 +20,5 @@ export default () => {
     <Provider store={store}>
       <HelloWorldContainer />
     </Provider>
-    );
+  );
 };
diff --git a/spec/dummy/client/app/startup/ClientRouterApp.jsx b/spec/dummy/client/app/startup/ClientRouterApp.jsx
index e501e9b67..2d2480f22 100644
--- a/spec/dummy/client/app/startup/ClientRouterApp.jsx
+++ b/spec/dummy/client/app/startup/ClientRouterApp.jsx
@@ -3,5 +3,7 @@ import { Router, browserHistory } from 'react-router';
 import routes from '../routes/routes';
 
 export default (props) => (
-  <Router history={browserHistory} children={routes} {...props} />
+  <Router history={browserHistory} {...props} >
+    {routes}
+  </Router>
 );
diff --git a/spec/dummy/client/app/startup/DeferredRenderAppRenderer.jsx b/spec/dummy/client/app/startup/DeferredRenderAppRenderer.jsx
index 6f71ab263..76c11747f 100644
--- a/spec/dummy/client/app/startup/DeferredRenderAppRenderer.jsx
+++ b/spec/dummy/client/app/startup/DeferredRenderAppRenderer.jsx
@@ -4,14 +4,14 @@ import { match, Router, browserHistory } from 'react-router';
 
 import DeferredRender from '../components/DeferredRender';
 
-const DeferredRenderAppRenderer = (props, railsContext, domNodeId) => {
+const DeferredRenderAppRenderer = (_props, _railsContext, domNodeId) => {
   const history = browserHistory;
   const routes = {
     path: '/deferred_render_with_server_rendering',
     component: DeferredRender,
     childRoutes: [{
       path: '/deferred_render_with_server_rendering/async_page',
-      getComponent(nextState, callback) {
+      getComponent(_nextState, callback) {
         require.ensure([], (require) => {
           const component = require('../components/DeferredRenderAsyncPage').default;
 
@@ -26,7 +26,7 @@ const DeferredRenderAppRenderer = (props, railsContext, domNodeId) => {
   // implements an asyncronous getComponent. Since we do server rendering for this
   // component, immediately rendering a Router could cause a client/server
   // checksum mismatch.
-  match({ history, routes }, (error, redirectionLocation, routerProps) => {
+  match({ history, routes }, (error, _redirectionLocation, routerProps) => {
     if (error) {
       throw error;
     }
diff --git a/spec/dummy/client/app/startup/DeferredRenderAppServer.jsx b/spec/dummy/client/app/startup/DeferredRenderAppServer.jsx
index 4695a84ef..0c6eb9245 100644
--- a/spec/dummy/client/app/startup/DeferredRenderAppServer.jsx
+++ b/spec/dummy/client/app/startup/DeferredRenderAppServer.jsx
@@ -4,7 +4,7 @@ import { match, RouterContext } from 'react-router';
 import DeferredRender from '../components/DeferredRender';
 import DeferredRenderAsyncPage from '../components/DeferredRenderAsyncPage';
 
-const DeferredRenderAppServer = (props, railsContext) => {
+const DeferredRenderAppServer = (_props, railsContext) => {
   let error;
   let redirectLocation;
   let routerProps;
diff --git a/spec/dummy/client/app/startup/ManualRenderAppRenderer.jsx b/spec/dummy/client/app/startup/ManualRenderAppRenderer.jsx
index 0b08a6473..a70fa5b8a 100644
--- a/spec/dummy/client/app/startup/ManualRenderAppRenderer.jsx
+++ b/spec/dummy/client/app/startup/ManualRenderAppRenderer.jsx
@@ -1,7 +1,7 @@
 import React from 'react';
 import ReactDOM from 'react-dom';
 
-export default (props, railsContext, domNodeId) => {
+export default (_props, _railsContext, domNodeId) => {
   const reactElement = (
     <div>
       <h1>Manual Render Example</h1>
diff --git a/spec/dummy/client/app/startup/ServerReduxSharedStoreApp.jsx b/spec/dummy/client/app/startup/ServerReduxSharedStoreApp.jsx
index ed926e65a..1f2d3b11c 100644
--- a/spec/dummy/client/app/startup/ServerReduxSharedStoreApp.jsx
+++ b/spec/dummy/client/app/startup/ServerReduxSharedStoreApp.jsx
@@ -20,5 +20,5 @@ export default () => {
     <Provider store={store}>
       <HelloWorldContainer />
     </Provider>
-    );
+  );
 };
diff --git a/spec/dummy/client/app/startup/ServerRouterApp.jsx b/spec/dummy/client/app/startup/ServerRouterApp.jsx
index 1fff87544..6d3369322 100644
--- a/spec/dummy/client/app/startup/ServerRouterApp.jsx
+++ b/spec/dummy/client/app/startup/ServerRouterApp.jsx
@@ -3,7 +3,7 @@ import { match, RouterContext } from 'react-router';
 
 import routes from '../routes/routes';
 
-export default (props, railsContext) => {
+export default (_props, railsContext) => {
   let error;
   let redirectLocation;
   let routeProps;
diff --git a/spec/dummy/client/app/stores/SharedReduxStore.jsx b/spec/dummy/client/app/stores/SharedReduxStore.jsx
index 95b5bb88a..b9541774a 100644
--- a/spec/dummy/client/app/stores/SharedReduxStore.jsx
+++ b/spec/dummy/client/app/stores/SharedReduxStore.jsx
@@ -9,6 +9,6 @@ import reducers from '../reducers/reducersIndex';
  */
 export default (props, railsContext) => {
   const combinedReducer = combineReducers(reducers);
-  props.railsContext = railsContext;
-  return applyMiddleware(middleware)(createStore)(combinedReducer, props);
+  const newProps = { ...props, railsContext };
+  return applyMiddleware(middleware)(createStore)(combinedReducer, newProps);
 };
diff --git a/spec/dummy/client/package.json b/spec/dummy/client/package.json
index 3498c1584..963e752b8 100644
--- a/spec/dummy/client/package.json
+++ b/spec/dummy/client/package.json
@@ -8,65 +8,64 @@
   },
   "main": "js/app.js",
   "dependencies": {
-    "autoprefixer": "^6.5.1",
+    "autoprefixer": "^6.6.0",
     "babel": "^6.5.2",
-    "babel-cli": "^6.16.0",
-    "babel-core": "^6.17.0",
-    "babel-loader": "^6.2.5",
-    "babel-polyfill": "^6.16.0",
-    "babel-preset-es2015": "^6.16.0",
+    "babel-cli": "^6.18.0",
+    "babel-core": "^6.21.0",
+    "babel-loader": "^6.2.10",
+    "babel-polyfill": "^6.20.0",
+    "babel-preset-es2015": "^6.18.0",
     "babel-preset-react": "^6.16.0",
     "babel-preset-stage-0": "^6.16.0",
-    "babel-runtime": "^6.11.6",
-    "css-loader": "^0.25.0",
+    "babel-runtime": "^6.20.0",
+    "css-loader": "^0.26.1",
     "es5-shim": "^4.5.9",
     "expose-loader": "^0.7.1",
     "extract-text-webpack-plugin": "^1.0.1",
     "file-loader": "^0.9.0",
-    "history": "^4.3.0",
-    "imports-loader": "^0.6.5",
+    "history": "^4.5.0",
+    "imports-loader": "^0.7.0",
     "jquery": "^3.1.1",
     "jquery-ujs": "^1.2.2",
     "loader-utils": "^0.2.16",
-    "lodash": "^4.16.4",
-    "node-libs-browser": "^1.0.0",
-    "node-sass": "^3.10.1",
-    "postcss-loader": "^1.0.0",
-    "react": "^15.3.2",
-    "react-dom": "^15.3.2",
+    "lodash": "^4.17.3",
+    "node-libs-browser": "^2.0.0",
+    "node-sass": "^4.1.1",
+    "postcss-loader": "^1.2.1",
+    "react": "^15.4.1",
+    "react-dom": "^15.4.1",
     "react-on-rails": "../../..",
-    "react-redux": "^4.4.5",
-    "react-router": "^2.8.1",
+    "react-redux": "^5.0.1",
+    "react-router": "^3.0.0",
     "redux": "^3.6.0",
     "redux-thunk": "^2.1.0",
-    "resolve-url-loader": "^1.6.0",
-    "sass-loader": "^4.0.2",
+    "resolve-url-loader": "^1.6.1",
+    "sass-loader": "^4.1.1",
     "sass-resources-loader": "1.1.0",
     "style-loader": "^0.13.1",
     "url-loader": "^0.5.7",
-    "webpack": "^1.13.2"
+    "webpack": "^1.14.0"
   },
   "devDependencies": {
     "babel-plugin-react-transform": "^2.0.2",
     "body-parser": "^1.15.2",
     "eslint": "^3.8.1",
-    "eslint-config-shakacode": "^6.0.0",
-    "eslint-plugin-react": "^6.4.1",
+    "eslint-config-shakacode": "^13.2.1",
+    "eslint-plugin-import": "^2.2.0",
+    "eslint-plugin-jsx-a11y": "^2.2.3",
+    "eslint-plugin-react": "^6.8.0",
     "fbjs": "^0.8.5",
-    "jscs": "^2.11.0",
     "jsdom": "^9.8.0",
     "react-transform-hmr": "^1.0.4",
-    "tape": "^4.6.2",
+    "tape": "^4.6.3",
     "webpack-dev-server": "^1.16.2"
   },
   "browser": {
     "fs": false
   },
   "scripts": {
-    "lint": "npm run eslint --silent && npm run jscs --silent",
+    "lint": "npm run eslint --silent",
     "eslint": "eslint --ext .js,.jsx .",
-    "jscs": "jscs --verbose .",
-    "jscs:fix": "jscs --verbose -x . --silent",
     "test": "npm run build:test && rspec",
     "build:test": "npm run build:client && npm run build:server",
     "build:production:client": "NODE_ENV=production webpack --config webpack.client.rails.build.config.js",
diff --git a/spec/dummy/client/server-rails-hot.js b/spec/dummy/client/server-rails-hot.js
index 9d14157f5..679ff0347 100644
--- a/spec/dummy/client/server-rails-hot.js
+++ b/spec/dummy/client/server-rails-hot.js
@@ -1,4 +1,5 @@
 /* eslint no-var: 0, no-console: 0, import/no-extraneous-dependencies: 0 */
+/* eslint-disable comma-dangle */
 
 // This file is used by the npm script:
 // "hot-assets": "babel-node server-rails-hot.js"
diff --git a/spec/dummy/client/tests b/spec/dummy/client/tests
deleted file mode 120000
index 3819056a3..000000000
--- a/spec/dummy/client/tests
+++ /dev/null
@@ -1 +0,0 @@
-../../../node_package/tests
\ No newline at end of file
diff --git a/spec/dummy/client/webpack.client.rails.build.config.js b/spec/dummy/client/webpack.client.rails.build.config.js
index 1c3a06ddf..828dd15e7 100644
--- a/spec/dummy/client/webpack.client.rails.build.config.js
+++ b/spec/dummy/client/webpack.client.rails.build.config.js
@@ -2,6 +2,8 @@
 // cd client && npm run build:client
 // Note that Foreman (Procfile.dev) has also been configured to take care of this.
 
+/* eslint-disable comma-dangle */
+
 const webpack = require('webpack');
 const ExtractTextPlugin = require('extract-text-webpack-plugin');
 
diff --git a/spec/dummy/client/webpack.client.rails.hot.config.js b/spec/dummy/client/webpack.client.rails.hot.config.js
index 7f3012613..8ff7d9a69 100644
--- a/spec/dummy/client/webpack.client.rails.hot.config.js
+++ b/spec/dummy/client/webpack.client.rails.hot.config.js
@@ -2,6 +2,7 @@
 // rails s
 // cd client && babel-node server-rails-hot.js
 // Note that Foreman (Procfile.dev) has also been configured to take care of this.
+/* eslint-disable comma-dangle */
 
 const path = require('path');
 const webpack = require('webpack');
diff --git a/spec/dummy/client/webpack.server.rails.build.config.js b/spec/dummy/client/webpack.server.rails.build.config.js
index 3b742be45..397614d83 100644
--- a/spec/dummy/client/webpack.server.rails.build.config.js
+++ b/spec/dummy/client/webpack.server.rails.build.config.js
@@ -1,4 +1,5 @@
 // Common webpack configuration for server bundle
+/* eslint-disable comma-dangle */
 
 const webpack = require('webpack');
 const path = require('path');
diff --git a/spec/dummy/config/puma.rb b/spec/dummy/config/puma.rb
new file mode 100644
index 000000000..fa11fb8fd
--- /dev/null
+++ b/spec/dummy/config/puma.rb
@@ -0,0 +1,47 @@
+# Puma can serve each request in a thread from an internal thread pool.
+# The `threads` method setting takes two numbers a minimum and maximum.
+# Any libraries that use thread pools should be configured to match
+# the maximum value specified for Puma. Default is set to 5 threads for minimum
+# and maximum, this matches the default thread size of Active Record.
+#
+threads_count = ENV.fetch("RAILS_MAX_THREADS") { 5 }.to_i
+threads threads_count, threads_count
+
+# Specifies the `port` that Puma will listen on to receive requests, default is 3000.
+#
+port        ENV.fetch("PORT") { 3000 }
+
+# Specifies the `environment` that Puma will run in.
+#
+environment ENV.fetch("RAILS_ENV") { "development" }
+
+# Specifies the number of `workers` to boot in clustered mode.
+# Workers are forked webserver processes. If using threads and workers together
+# the concurrency of the application would be max `threads` * `workers`.
+# Workers do not work on JRuby or Windows (both of which do not support
+# processes).
+#
+workers ENV.fetch("WEB_CONCURRENCY") { 2 }
+
+# Use the `preload_app!` method when specifying a `workers` number.
+# This directive tells Puma to first boot the application and load code
+# before forking the application. This takes advantage of Copy On Write
+# process behavior so workers use less memory. If you use this option
+# you need to make sure to reconnect any threads in the `on_worker_boot`
+# block.
+#
+preload_app!
+
+# The code in the `on_worker_boot` will be called if you are using
+# clustered mode by specifying a number of `workers`. After each worker
+# process is booted this block will be run, if you are using `preload_app!`
+# option you will want to use this block to reconnect to any threads
+# or connections that may have been created at application boot, Ruby
+# cannot share connections between processes.
+#
+on_worker_boot do
+  ActiveRecord::Base.establish_connection if defined?(ActiveRecord)
+end
+
+# Allow puma to be restarted by `rails restart` command.
+plugin :tmp_restart
diff --git a/spec/dummy/npm-shrinkwrap.json b/spec/dummy/npm-shrinkwrap.json
deleted file mode 100644
index 9a8c013eb..000000000
--- a/spec/dummy/npm-shrinkwrap.json
+++ /dev/null
@@ -1,942 +0,0 @@
-{
-  "name": "react_on_rails",
-  "version": "2.0.0-rc.2",
-  "dependencies": {
-    "acorn-to-esprima": {
-      "version": "2.0.8",
-      "from": "acorn-to-esprima@>=2.0.4 <3.0.0",
-      "resolved": "https://registry.npmjs.org/acorn-to-esprima/-/acorn-to-esprima-2.0.8.tgz"
-    },
-    "align-text": {
-      "version": "0.1.3",
-      "from": "align-text@>=0.1.0 <0.2.0",
-      "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.3.tgz"
-    },
-    "amdefine": {
-      "version": "1.0.0",
-      "from": "amdefine@>=0.0.4",
-      "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.0.tgz"
-    },
-    "ansi-escapes": {
-      "version": "1.1.1",
-      "from": "ansi-escapes@>=1.1.0 <2.0.0",
-      "resolved": "https://registry.npmjs.org/ansi-escapes/-/ansi-escapes-1.1.1.tgz"
-    },
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diff --git a/spec/dummy/package.json b/spec/dummy/package.json
index 177ff7c88..c2f52a7ca 100644
--- a/spec/dummy/package.json
+++ b/spec/dummy/package.json
@@ -37,9 +37,7 @@
     "url": "https://github.com/shakacode/react_on_rails/issues"
   },
   "devDependencies": {
-    "babel-eslint": "^5.0.0-beta6",
-    "eslint": "^1.10.3",
-    "eslint-config-airbnb": "^3.1.0",
-    "eslint-config-shakacode": "0.0.1"
+  },
+  "dependencies": {
   }
 }
diff --git a/spec/dummy/spec/features/integration_spec.rb b/spec/dummy/spec/features/integration_spec.rb
index ba89efadc..87b1eb230 100644
--- a/spec/dummy/spec/features/integration_spec.rb
+++ b/spec/dummy/spec/features/integration_spec.rb
@@ -183,7 +183,7 @@ def change_text_expect_dom_selector(dom_selector)
     scenario "Type in one component changes the other component" do
       expect(current_path).to eq(url)
       new_text = "John Doe"
-      new_text_2 = "Jane Smith"
+      new_text2 = "Jane Smith"
       within("#ReduxSharedStoreApp-react-component-0") do
         find("input").set new_text
         within("h3") do
@@ -194,11 +194,11 @@ def change_text_expect_dom_selector(dom_selector)
         within("h3") do
           is_expected.to have_content new_text
         end
-        find("input").set new_text_2
+        find("input").set new_text2
       end
       within("#ReduxSharedStoreApp-react-component-0") do
         within("h3") do
-          is_expected.to have_content new_text_2
+          is_expected.to have_content new_text2
         end
       end
     end
diff --git a/spec/react_on_rails/support/generator_spec_helper.rb b/spec/react_on_rails/support/generator_spec_helper.rb
index 9623e8f31..5d026f55b 100644
--- a/spec/react_on_rails/support/generator_spec_helper.rb
+++ b/spec/react_on_rails/support/generator_spec_helper.rb
@@ -23,11 +23,12 @@ def simulate_existing_rails_files(options)
   simulate_existing_file("config/routes.rb", "Rails.application.routes.draw do\nend\n")
   simulate_existing_file("config/application.rb",
                          "module Gentest\nclass Application < Rails::Application\nend\nend)")
-  if options.fetch(:spec, true)
-    simulate_existing_dir("spec")
-    simulate_existing_file("spec/rails_helper.rb",
-                           "RSpec.configure do |config|\nend\n")
-  end
+
+  return unless options.fetch(:spec, true)
+
+  simulate_existing_dir("spec")
+  simulate_existing_file("spec/rails_helper.rb",
+                         "RSpec.configure do |config|\nend\n")
 end
 
 def simulate_existing_assets_files(options)