diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..4f127d9
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,13 @@
+---
+name: test
+on: [push, pull_request]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 3.4
+          bundler-cache: true
+      - run: bundle exec rake
\ No newline at end of file
diff --git a/.rubocop.yml b/.rubocop.yml
index bdd4025..ed844a8 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,6 +1,11 @@
 AllCops:
+  NewCops: enable
   Exclude:
     - vendor/**/*
     - bin/**/*
 
+plugins:
+  - rubocop-rake
+  - rubocop-rspec
+
 inherit_from: .rubocop_todo.yml
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index f1f00df..680c398 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,28 +1,84 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2015-08-06 12:31:48 -0400 using RuboCop version 0.33.0.
+# on 2025-09-10 16:24:35 UTC using RuboCop version 1.80.2.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
 # versions of RuboCop, may require this file to be generated again.
 
 # Offense count: 1
-Metrics/AbcSize:
-  Max: 19
+# This cop supports unsafe autocorrection (--autocorrect-all).
+Lint/NonDeterministicRequireOrder:
+  Exclude:
+    - 'config/application.rb'
 
-# Offense count: 18
-# Configuration parameters: AllowURI, URISchemes.
-Metrics/LineLength:
-  Max: 152
+# Offense count: 1
+# Configuration parameters: AllowedMethods, AllowedPatterns, CountRepeatedAttributes.
+Metrics/AbcSize:
+  Max: 18
 
 # Offense count: 1
-# Configuration parameters: CountComments.
+# Configuration parameters: CountComments, CountAsOne, AllowedMethods, AllowedPatterns, inherit_mode.
+# AllowedMethods: refine
+Metrics/BlockLength:
+  Max: 45
+
+# Offense count: 2
+# Configuration parameters: CountComments, CountAsOne, AllowedMethods, AllowedPatterns.
 Metrics/MethodLength:
   Max: 15
 
+# Offense count: 3
+RSpec/AnyInstance:
+  Exclude:
+    - 'spec/api/splines_endpoint_spec.rb'
+
+# Offense count: 5
+# Configuration parameters: Prefixes, AllowedPatterns.
+# Prefixes: when, with, without
+RSpec/ContextWording:
+  Exclude:
+    - 'spec/api/cors_spec.rb'
+    - 'spec/api/splines_endpoint_spec.rb'
+    - 'spec/api/splines_endpoint_with_hyperclient_spec.rb'
+
+# Offense count: 5
+# Configuration parameters: CountAsOne.
+RSpec/ExampleLength:
+  Max: 10
+
+# Offense count: 19
+RSpec/MultipleExpectations:
+  Max: 5
+
+# Offense count: 4
+# Configuration parameters: CustomTransform, IgnoreMethods, IgnoreMetadata.
+RSpec/SpecFilePathFormat:
+  Exclude:
+    - '**/spec/routing/**/*'
+    - 'spec/api/cors_spec.rb'
+    - 'spec/api/root_endpoint_spec.rb'
+    - 'spec/api/splines_endpoint_spec.rb'
+    - 'spec/api/splines_endpoint_with_hyperclient_spec.rb'
+
+# Offense count: 1
+# This cop supports safe autocorrection (--autocorrect).
+Rake/Desc:
+  Exclude:
+    - 'Rakefile'
+
+# Offense count: 2
+# This cop supports unsafe autocorrection (--autocorrect-all).
+Style/CommentedKeyword:
+  Exclude:
+    - 'api/splines_endpoint.rb'
+
 # Offense count: 9
+# Configuration parameters: AllowedConstants.
 Style/Documentation:
   Exclude:
+    - 'spec/**/*'
+    - 'test/**/*'
     - 'api/extensions/crud_extension.rb'
     - 'api/presenters/paginated_presenter.rb'
     - 'api/presenters/root_presenter.rb'
@@ -33,7 +89,16 @@ Style/Documentation:
     - 'app/models/spline.rb'
     - 'app/root_endpoint.rb'
 
+# Offense count: 20
+# This cop supports unsafe autocorrection (--autocorrect-all).
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: always, always_true, never
+Style/FrozenStringLiteralComment:
+  Enabled: false
+
 # Offense count: 1
-Style/DoubleNegation:
-  Exclude:
-    - 'app/models/spline.rb'
+# This cop supports safe autocorrection (--autocorrect).
+# Configuration parameters: AllowHeredoc, AllowURI, AllowQualifiedName, URISchemes, IgnoreCopDirectives, AllowedPatterns, SplitStrings.
+# URISchemes: http, https
+Layout/LineLength:
+  Max: 129
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index c9a6e8a..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,8 +0,0 @@
-sudo: false
-
-rvm:
-  - 2.3.0
-
-language: ruby
-
-cache: bundler
diff --git a/Gemfile b/Gemfile
index 391393e..30c02b3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,21 +1,24 @@
 source 'http://rubygems.org'
 
+gem 'activemodel'
+gem 'faraday-rack'
 gem 'grape'
 gem 'grape-roar'
-gem 'rack-cors'
 gem 'grape-swagger'
-gem 'activemodel'
-gem 'kaminari', require: 'kaminari/grape'
-gem 'rack-rewrite'
+gem 'kaminari-grape'
 gem 'puma'
+gem 'rack-cors'
+gem 'rack-rewrite'
 
 group :development do
   gem 'rake'
   gem 'rubocop'
+  gem 'rubocop-rake'
+  gem 'rubocop-rspec'
 end
 
 group :test do
-  gem 'rspec'
-  gem 'rack-test'
   gem 'hyperclient'
+  gem 'rack-test'
+  gem 'rspec'
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index 5f1214a..de2d1b4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,164 +1,181 @@
 GEM
   remote: http://rubygems.org/
   specs:
-    actionpack (4.2.6)
-      actionview (= 4.2.6)
-      activesupport (= 4.2.6)
-      rack (~> 1.6)
-      rack-test (~> 0.6.2)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (4.2.6)
-      activesupport (= 4.2.6)
-      builder (~> 3.1)
-      erubis (~> 2.7.0)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    activemodel (4.2.6)
-      activesupport (= 4.2.6)
-      builder (~> 3.1)
-    activesupport (4.2.6)
-      i18n (~> 0.7)
-      json (~> 1.7, >= 1.7.7)
-      minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
-      tzinfo (~> 1.1)
-    ast (2.2.0)
-    axiom-types (0.1.1)
-      descendants_tracker (~> 0.0.4)
-      ice_nine (~> 0.11.0)
-      thread_safe (~> 0.3, >= 0.3.1)
-    builder (3.2.2)
-    coercible (1.0.0)
-      descendants_tracker (~> 0.0.1)
-    descendants_tracker (0.0.4)
-      thread_safe (~> 0.3, >= 0.3.1)
-    diff-lcs (1.2.5)
-    equalizer (0.0.11)
-    erubis (2.7.0)
-    faraday (0.9.2)
-      multipart-post (>= 1.2, < 3)
-    faraday-digestauth (0.2.1)
-      faraday (~> 0.7)
-      net-http-digest_auth (~> 1.4)
-    faraday_hal_middleware (0.0.1)
-      faraday_middleware (>= 0.9, < 0.10)
-    faraday_middleware (0.9.2)
-      faraday (>= 0.7.4, < 0.10)
-    futuroscope (0.1.11)
-    grape (0.15.0)
-      activesupport
-      builder
-      hashie (>= 2.1.0)
-      multi_json (>= 1.3.2)
-      multi_xml (>= 0.5.2)
-      rack (>= 1.3.0)
-      rack-accept
-      rack-mount
-      virtus (>= 1.0.0)
-    grape-entity (0.4.8)
-      activesupport
-      multi_json (>= 1.3.2)
-    grape-roar (0.3.0)
+    activemodel (8.0.2.1)
+      activesupport (= 8.0.2.1)
+    activesupport (8.0.2.1)
+      base64
+      benchmark (>= 0.3)
+      bigdecimal
+      concurrent-ruby (~> 1.0, >= 1.3.1)
+      connection_pool (>= 2.2.5)
+      drb
+      i18n (>= 1.6, < 2)
+      logger (>= 1.4.2)
+      minitest (>= 5.1)
+      securerandom (>= 0.3)
+      tzinfo (~> 2.0, >= 2.0.5)
+      uri (>= 0.13.1)
+    addressable (2.8.7)
+      public_suffix (>= 2.0.2, < 7.0)
+    ast (2.4.3)
+    base64 (0.3.0)
+    benchmark (0.4.1)
+    bigdecimal (3.2.3)
+    concurrent-ruby (1.3.5)
+    connection_pool (2.5.4)
+    declarative (0.0.20)
+    diff-lcs (1.6.2)
+    drb (2.2.3)
+    dry-core (1.1.0)
+      concurrent-ruby (~> 1.0)
+      logger
+      zeitwerk (~> 2.6)
+    dry-inflector (1.2.0)
+    dry-logic (1.6.0)
+      bigdecimal
+      concurrent-ruby (~> 1.0)
+      dry-core (~> 1.1)
+      zeitwerk (~> 2.6)
+    dry-types (1.8.3)
+      bigdecimal (~> 3.0)
+      concurrent-ruby (~> 1.0)
+      dry-core (~> 1.0)
+      dry-inflector (~> 1.0)
+      dry-logic (~> 1.4)
+      zeitwerk (~> 2.6)
+    faraday (2.13.4)
+      faraday-net_http (>= 2.0, < 3.5)
+      json
+      logger
+    faraday-follow_redirects (0.3.0)
+      faraday (>= 1, < 3)
+    faraday-net_http (3.4.1)
+      net-http (>= 0.5.0)
+    faraday-rack (2.1.3)
+      faraday (~> 2.0)
+    faraday_hal_middleware (0.2.0)
+      faraday (~> 2.0)
+    grape (2.4.0)
+      activesupport (>= 6.1)
+      dry-types (>= 1.1)
+      mustermann-grape (~> 1.1.0)
+      rack (>= 2)
+      zeitwerk
+    grape-roar (0.4.1)
       grape
-      roar (>= 1.0)
-    grape-swagger (0.10.4)
-      grape (>= 0.8.0)
-      grape-entity (< 0.5.0)
-    hashie (3.4.3)
-    hyperclient (0.8.1)
-      faraday
-      faraday-digestauth
-      faraday_hal_middleware
-      faraday_middleware
-      futuroscope
-      net-http-digest_auth
-      uri_template
-    i18n (0.7.0)
-    ice_nine (0.11.2)
-    json (1.8.3)
-    kaminari (0.16.3)
-      actionpack (>= 3.0.0)
-      activesupport (>= 3.0.0)
-    loofah (2.0.3)
-      nokogiri (>= 1.5.9)
-    mini_portile2 (2.0.0)
-    minitest (5.8.4)
-    multi_json (1.11.2)
-    multi_xml (0.5.5)
-    multipart-post (2.0.0)
-    net-http-digest_auth (1.4)
-    nokogiri (1.6.7.2)
-      mini_portile2 (~> 2.0.0.rc2)
-    parser (2.3.0.6)
-      ast (~> 2.2)
-    powerpack (0.1.1)
-    puma (3.1.0)
-    rack (1.6.4)
-    rack-accept (0.4.5)
-      rack (>= 0.4)
-    rack-cors (0.4.0)
-    rack-mount (0.8.3)
-      rack (>= 1.0.0)
+      multi_json
+      roar (~> 1.1.0)
+    grape-swagger (2.1.2)
+      grape (>= 1.7, < 3.0)
+      rack-test (~> 2)
+    hyperclient (2.0.0)
+      addressable
+      faraday (>= 2)
+      faraday-follow_redirects
+      faraday_hal_middleware (>= 0.2)
+    i18n (1.14.7)
+      concurrent-ruby (~> 1.0)
+    json (2.13.2)
+    kaminari-core (1.2.2)
+    kaminari-grape (1.0.1)
+      grape
+      kaminari-core (~> 1.0)
+    language_server-protocol (3.17.0.5)
+    lint_roller (1.1.0)
+    logger (1.7.0)
+    minitest (5.25.5)
+    multi_json (1.17.0)
+    mustermann (3.0.4)
+      ruby2_keywords (~> 0.0.1)
+    mustermann-grape (1.1.0)
+      mustermann (>= 1.0.0)
+    net-http (0.6.0)
+      uri
+    nio4r (2.7.4)
+    parallel (1.27.0)
+    parser (3.3.9.0)
+      ast (~> 2.4.1)
+      racc
+    prism (1.4.0)
+    public_suffix (6.0.2)
+    puma (7.0.2)
+      nio4r (~> 2.0)
+    racc (1.8.1)
+    rack (3.2.1)
+    rack-cors (3.0.0)
+      logger
+      rack (>= 3.0.14)
     rack-rewrite (1.5.1)
-    rack-test (0.6.3)
-      rack (>= 1.0)
-    rails-deprecated_sanitizer (1.0.3)
-      activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (1.0.7)
-      activesupport (>= 4.2.0.beta, < 5.0)
-      nokogiri (~> 1.6.0)
-      rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.0.3)
-      loofah (~> 2.0)
-    rainbow (2.1.0)
-    rake (11.1.1)
-    representable (2.3.0)
-      uber (~> 0.0.7)
-    roar (1.0.4)
-      representable (>= 2.0.1, < 2.4.0)
-    rspec (3.4.0)
-      rspec-core (~> 3.4.0)
-      rspec-expectations (~> 3.4.0)
-      rspec-mocks (~> 3.4.0)
-    rspec-core (3.4.4)
-      rspec-support (~> 3.4.0)
-    rspec-expectations (3.4.0)
+    rack-test (2.2.0)
+      rack (>= 1.3)
+    rainbow (3.1.1)
+    rake (13.3.0)
+    regexp_parser (2.11.2)
+    representable (3.2.0)
+      declarative (< 0.1.0)
+      trailblazer-option (>= 0.1.1, < 0.2.0)
+      uber (< 0.2.0)
+    roar (1.1.1)
+      representable (~> 3.0)
+    rspec (3.13.1)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.5)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.5)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.4.0)
-    rspec-mocks (3.4.1)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.5)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.4.0)
-    rspec-support (3.4.1)
-    rubocop (0.38.0)
-      parser (>= 2.3.0.6, < 3.0)
-      powerpack (~> 0.1)
-      rainbow (>= 1.99.1, < 3.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.5)
+    rubocop (1.80.2)
+      json (~> 2.3)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.1.0)
+      parallel (~> 1.10)
+      parser (>= 3.3.0.2)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 2.9.3, < 3.0)
+      rubocop-ast (>= 1.46.0, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (~> 1.0, >= 1.0.1)
-    ruby-progressbar (1.7.5)
-    thread_safe (0.3.5)
-    tzinfo (1.2.2)
-      thread_safe (~> 0.1)
-    uber (0.0.15)
-    unicode-display_width (1.0.2)
-    uri_template (0.7.0)
-    virtus (1.0.5)
-      axiom-types (~> 0.1)
-      coercible (~> 1.0)
-      descendants_tracker (~> 0.0, >= 0.0.3)
-      equalizer (~> 0.0, >= 0.0.9)
+      unicode-display_width (>= 2.4.0, < 4.0)
+    rubocop-ast (1.46.0)
+      parser (>= 3.3.7.2)
+      prism (~> 1.4)
+    rubocop-rake (0.7.1)
+      lint_roller (~> 1.1)
+      rubocop (>= 1.72.1)
+    rubocop-rspec (3.7.0)
+      lint_roller (~> 1.1)
+      rubocop (~> 1.72, >= 1.72.1)
+    ruby-progressbar (1.13.0)
+    ruby2_keywords (0.0.5)
+    securerandom (0.4.1)
+    trailblazer-option (0.1.2)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
+    uber (0.1.0)
+    unicode-display_width (3.2.0)
+      unicode-emoji (~> 4.1)
+    unicode-emoji (4.1.0)
+    uri (1.0.3)
+    zeitwerk (2.7.3)
 
 PLATFORMS
+  arm64-darwin-24
   ruby
 
 DEPENDENCIES
   activemodel
+  faraday-rack
   grape
   grape-roar
   grape-swagger
   hyperclient
-  kaminari
+  kaminari-grape
   puma
   rack-cors
   rack-rewrite
@@ -166,6 +183,8 @@ DEPENDENCIES
   rake
   rspec
   rubocop
+  rubocop-rake
+  rubocop-rspec
 
 BUNDLED WITH
-   1.10.6
+   2.6.9
diff --git a/README.md b/README.md
index 28e91cd..8671da7 100644
--- a/README.md
+++ b/README.md
@@ -1,17 +1,10 @@
 Grape API with Roar
 ===================
 
-[![Build Status](https://travis-ci.org/ruby-grape/grape-with-roar.svg?branch=master)](https://travis-ci.org/ruby-grape/grape-with-roar)
-[![Dependency Status](https://gemnasium.com/ruby-grape/grape-with-roar.svg)](https://gemnasium.com/ruby-grape/grape-with-roar)
-[![Code Climate](https://codeclimate.com/github/ruby-grape/grape-with-roar.svg)](https://codeclimate.com/github/ruby-grape/grape-with-roar)
+[![test](https://github.com/ruby-grape/grape-with-roar/actions/workflows/test.yml/badge.svg)](https://github.com/ruby-grape/grape-with-roar/actions/workflows/test.yml)
 
 A [Grape](http://github.com/ruby-grape/grape) API that uses [Roar](https://github.com/apotonick/roar).
 
-See
----
-
-Try me [here](http://grape-with-roar.herokuapp.com/). In Chrome, best viewed with the [JSONView Plugin](https://chrome.google.com/webstore/detail/jsonview/chklaanhfefbnpoihckbnefhakgolnmc?hl=en).
-
 Run
 ---
 
@@ -24,10 +17,10 @@ $ rackup
 [2013-06-20 08:57:58] INFO  WEBrick::HTTPServer#start: pid=247 port=9292
 ```
 
-### Hello World
-
 Navigate to [localhost:9292/api](http://localhost:9292/api) with a browser. This is a hypermedia API, so all links are clickable.
 
+In Chrome, best viewed with the [JSONView Plugin](https://chrome.google.com/webstore/detail/jsonview/chklaanhfefbnpoihckbnefhakgolnmc?hl=en).
+
 Hyperclient
 -----------
 
@@ -51,6 +44,6 @@ Check out the [with-mongoid branch](https://github.com/ruby-grape/grape-with-roa
 Copyright and License
 ---------------------
 
-Copyright (c) 2014-2016 Daniel Doubrovkine
+Copyright (c) 2014-2025 Daniel Doubrovkine
 
 MIT License, see [LICENSE](LICENSE) for details.
diff --git a/Rakefile b/Rakefile
index 8beb9eb..fcea863 100644
--- a/Rakefile
+++ b/Rakefile
@@ -7,7 +7,7 @@ require 'rake'
 
 task :environment do
   ENV['RACK_ENV'] ||= 'development'
-  require File.expand_path('../config/environment', __FILE__)
+  require File.expand_path('config/environment', __dir__)
 end
 
 unless ENV['RACK_ENV'] == 'production'
@@ -21,5 +21,5 @@ unless ENV['RACK_ENV'] == 'production'
   require 'rubocop/rake_task'
   RuboCop::RakeTask.new(:rubocop)
 
-  task default: [:rubocop, :spec]
+  task default: %i[rubocop spec]
 end
diff --git a/app/acme_app.rb b/app/acme_app.rb
index 53a4bc5..9e30e71 100644
--- a/app/acme_app.rb
+++ b/app/acme_app.rb
@@ -4,7 +4,7 @@ def initialize
       @filenames = ['', '.html', 'index.html', '/index.html']
       @rack_static = ::Rack::Static.new(
         -> { [404, {}, []] },
-        root: File.expand_path('../../public', __FILE__),
+        root: File.expand_path('../public', __dir__),
         urls: ['/']
       )
     end
@@ -20,7 +20,7 @@ def self.instance
 
         # rewrite HAL links to make them clickable in a browser
         use Rack::Rewrite do
-          r302 %r{^([\/\w]*)(%7B|\{)?(.*)(%7D|\})$}, '$1'
+          r302 %r{^([/\w]*)(%7B|\{)?(.*)(%7D|\})$}, '$1'
         end
 
         run Acme::App.new
diff --git a/app/models/spline.rb b/app/models/spline.rb
index b2caaeb..367a09e 100644
--- a/app/models/spline.rb
+++ b/app/models/spline.rb
@@ -3,11 +3,10 @@ module Models
     class Spline
       include ActiveModel::Model
 
-      attr_accessor :uuid
-      attr_accessor :reticulated
+      attr_accessor :uuid, :reticulated
 
       def initialize(attrs = { reticulated: [true, false].sample })
-        super(attrs)
+        super
         @uuid ||= SecureRandom.uuid
         @reticulated = !!attrs[:reticulated]
       end
@@ -20,11 +19,9 @@ def self.find(uuid)
         Acme::Models::Spline.new(uuid: uuid)
       end
 
-      def save!
-      end
+      def save!; end
 
-      def destroy
-      end
+      def destroy; end
     end
   end
 end
diff --git a/config.ru b/config.ru
index c8af3f1..7a0d5d7 100644
--- a/config.ru
+++ b/config.ru
@@ -1,2 +1,2 @@
-require File.expand_path('../config/environment', __FILE__)
+require File.expand_path('config/environment', __dir__)
 run Acme::App.instance
diff --git a/config/application.rb b/config/application.rb
index dc56863..f6f2fac 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -4,7 +4,7 @@
 
 require 'boot'
 
-Bundler.require :default, ENV['RACK_ENV']
+Bundler.require :default, ENV.fetch('RACK_ENV', nil)
 
 require 'roar/representer'
 require 'roar/json'
diff --git a/config/environment.rb b/config/environment.rb
index e1b44f6..c26ecf1 100644
--- a/config/environment.rb
+++ b/config/environment.rb
@@ -1,3 +1,3 @@
 ENV['RACK_ENV'] ||= 'test'
 
-require File.expand_path('../application', __FILE__)
+require File.expand_path('application', __dir__)
diff --git a/spec/api/cors_spec.rb b/spec/api/cors_spec.rb
index 925830c..f5ec2fe 100644
--- a/spec/api/cors_spec.rb
+++ b/spec/api/cors_spec.rb
@@ -8,25 +8,34 @@ def app
   end
 
   context 'CORS' do
+    it 'without options' do
+      options '/'
+      expect(last_response.status).to eq 200
+      expect(last_response.headers['Access-Control-Allow-Origin']).to be_nil
+      expect(last_response.headers['Access-Control-Expose-Headers']).to be_nil
+    end
+
     it 'supports options' do
       options '/', {},
-              'HTTP_ORIGIN' => 'http://cors.example.com',
+              'HTTP_ORIGIN' => 'https://cors.example.com',
               'HTTP_ACCESS_CONTROL_REQUEST_HEADERS' => 'Origin, Accept, Content-Type',
               'HTTP_ACCESS_CONTROL_REQUEST_METHOD' => 'GET'
 
       expect(last_response.status).to eq 200
-      expect(last_response.headers['Access-Control-Allow-Origin']).to eq 'http://cors.example.com'
+      expect(last_response.headers['Access-Control-Allow-Origin']).to eq '*'
       expect(last_response.headers['Access-Control-Expose-Headers']).to eq ''
     end
+
     it 'includes Access-Control-Allow-Origin in the response' do
-      get '/api', {}, 'HTTP_ORIGIN' => 'http://cors.example.com'
+      get '/api', {}, 'HTTP_ORIGIN' => 'https://cors.example.com'
       expect(last_response.status).to eq 200
-      expect(last_response.headers['Access-Control-Allow-Origin']).to eq 'http://cors.example.com'
+      expect(last_response.headers['Access-Control-Allow-Origin']).to eq '*'
     end
+
     it 'includes Access-Control-Allow-Origin in errors' do
-      get '/invalid', {}, 'HTTP_ORIGIN' => 'http://cors.example.com'
+      get '/invalid', {}, 'HTTP_ORIGIN' => 'https://cors.example.com'
       expect(last_response.status).to eq 404
-      expect(last_response.headers['Access-Control-Allow-Origin']).to eq 'http://cors.example.com'
+      expect(last_response.headers['Access-Control-Allow-Origin']).to eq '*'
     end
   end
 end
diff --git a/spec/api/root_endpoint_spec.rb b/spec/api/root_endpoint_spec.rb
index 4c2e8fc..3b98cfd 100644
--- a/spec/api/root_endpoint_spec.rb
+++ b/spec/api/root_endpoint_spec.rb
@@ -11,8 +11,9 @@ def app
     get '/api'
     expect(last_response.status).to eq 200
     links = JSON.parse(last_response.body)['_links']
-    expect(links.keys.sort).to eq(%w(self spline splines swagger_doc))
+    expect(links.keys.sort).to eq(%w[self spline splines swagger_doc])
   end
+
   it 'follows all links' do
     get '/api'
     expect(last_response.status).to eq 200
@@ -20,16 +21,19 @@ def app
     links.each_pair do |_key, h|
       href = h['href']
       next if href.include?('{') # templated link
+
       get href.gsub('http://example.org', '')
       expect(last_response.status).to eq 200
-      expect(JSON.parse(last_response.body)).to_not eq({})
+      expect(JSON.parse(last_response.body)).not_to eq({})
     end
   end
+
   it 'rewrites encoded HAL links to make them clickable' do
     get '/api/splines/%7B?cursor,size%7D'
     expect(last_response.status).to eq 302
     expect(last_response.headers['Location']).to eq '/api/splines/'
   end
+
   it 'rewrites encoded HAL links without a trailing slash to make them clickable' do
     get '/api/splines%7B?cursor,size%7D'
     expect(last_response.status).to eq 302
diff --git a/spec/api/splines_endpoint_spec.rb b/spec/api/splines_endpoint_spec.rb
index 9daacf6..db58fbe 100644
--- a/spec/api/splines_endpoint_spec.rb
+++ b/spec/api/splines_endpoint_spec.rb
@@ -45,7 +45,7 @@ def app
       post '/api/splines', spline: { reticulated: false }
       expect(last_response.status).to eq 201
       json = JSON.parse(last_response.body)
-      expect(json['uuid']).to_not be_blank
+      expect(json['uuid']).not_to be_blank
     end
 
     it 'updates a spline' do
@@ -71,7 +71,8 @@ def app
       json = JSON.parse(last_response.body)
       expect(json['uuid']).to eq '123'
       expect(json['_links']['self']['href']).to eq 'http://example.org/api/splines/123'
-      expect(json['_links']['curies']).to eq([{ 'name' => 'images', 'href' => 'http://example.org/docs/splines/images/{rel}', 'templated' => true }])
+      expect(json['_links']['curies']).to eq([{ 'name' => 'images',
+                                                'href' => 'http://example.org/docs/splines/images/{rel}', 'templated' => true }])
       expect(json['_links']['images:thumbnail']['href']).to eq 'http://example.org/api/splines/123/images/thumbnail.jpg'
     end
   end
diff --git a/spec/api/splines_endpoint_with_hyperclient_spec.rb b/spec/api/splines_endpoint_with_hyperclient_spec.rb
index 4479c9a..19433be 100644
--- a/spec/api/splines_endpoint_with_hyperclient_spec.rb
+++ b/spec/api/splines_endpoint_with_hyperclient_spec.rb
@@ -11,18 +11,14 @@ def app
       client.connection(default: false) do |conn|
         conn.request :json
         conn.response :json
-        conn.use Faraday::Adapter::Rack, app
+        conn.adapter Faraday::Adapter::Rack, app
       end
     end
   end
 
   context 'splines' do
-    it 'returns 3 splines by default' do
-      expect(client.splines({}).count).to eq 3
-    end
-
-    it 'returns 2 splines' do
-      expect(client.splines(size: 2).count).to eq 2
+    it 'returns all splines' do
+      expect(client.splines({}).count).to eq 42
     end
 
     it 'returns pagination' do
@@ -34,14 +30,14 @@ def app
 
     it 'returns all unique uuids' do
       splines = client.splines({})
-      expect(splines.map(&:uuid).uniq.count).to eq 3
+      expect(splines.map(&:uuid).uniq.count).to eq 42
     end
   end
 
   context 'spline' do
     it 'creates a spline' do
       spline = client.splines._post(spline: { reticulated: true })
-      expect(spline.uuid).to_not be_blank
+      expect(spline.uuid).not_to be_blank
       expect(spline.reticulated).to be true
     end
 
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index ea8e087..2449102 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -4,7 +4,7 @@
 
 require 'rack/test'
 
-require File.expand_path('../../config/environment', __FILE__)
+require File.expand_path('../config/environment', __dir__)
 
 RSpec.configure do |config|
   config.mock_with :rspec