diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 62cf909..74f0dca 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,7 +2,10 @@ name: CI
 
 on:
   pull_request:
-    branches: [ '**' ]
+    branches: ["**"]
+
+permissions:
+  contents: read
 
 jobs:
   # Set the job key. The key is displayed as the job name
@@ -10,7 +13,7 @@ jobs:
   tests:
     strategy:
       matrix:
-        ruby: [ '2.6', '2.7', '3.0' ]
+        ruby: ["3.4", "3.3", "3.2"]
 
     name: Tests - Ruby ${{ matrix.ruby }}
     # Set the type of machine to run on
@@ -19,9 +22,9 @@ jobs:
     steps:
       # Checks out a copy of your repository on the ubuntu-latest machine
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: vendor/bundle
           key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}
@@ -42,4 +45,3 @@ jobs:
       - name: Run tests
         run: |
           bundle exec rake test
-
diff --git a/.github/workflows/linter.yml b/.github/workflows/linter.yml
index 42c317f..9c792f7 100644
--- a/.github/workflows/linter.yml
+++ b/.github/workflows/linter.yml
@@ -16,7 +16,12 @@ name: Lint Code Base
 #############################
 on:
   pull_request:
-    branches: [ '**' ]
+    branches: ["**"]
+
+permissions:
+  contents: read
+  statuses: write
+  checks: write
 
 ###############
 # Set the Job #
@@ -36,7 +41,7 @@ jobs:
       # Checkout the code base #
       ##########################
       - name: Checkout Code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           # Full git history is needed to get a proper list of changed files within `super-linter`
           fetch-depth: 0
@@ -45,7 +50,7 @@ jobs:
       # Run Linter against code base #
       ################################
       - name: Lint Code Base
-        uses: github/super-linter@v3
+        uses: github/super-linter@v7
         env:
           VALIDATE_ALL_CODEBASE: false
           DEFAULT_BRANCH: main
diff --git a/.jscpd.json b/.jscpd.json
new file mode 100644
index 0000000..0d56032
--- /dev/null
+++ b/.jscpd.json
@@ -0,0 +1,5 @@
+{
+  "threshold": 2,
+  "ignore": ["spec/**"],
+  "reporters": ["threshold"]
+}
diff --git a/.rubocop.yml b/.rubocop.yml
index 6cca6d2..8b76fd4 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,12 +1,15 @@
 AllCops:
   Include:
-    - './Rakefile'
-    - 'instapaper.gemspec'
-    - 'lib/**/*.rb'
-    - 'spec/**/*.rb'
+    - "./Rakefile"
+    - "instapaper.gemspec"
+    - "lib/**/*.rb"
+    - "spec/**/*.rb"
   DisplayCopNames: true
   NewCops: enable
 
+Gemspec/RequireMFA:
+  Enabled: false
+
 Metrics/BlockLength:
   Max: 36
   Exclude:
@@ -15,7 +18,7 @@ Metrics/BlockLength:
 Metrics/BlockNesting:
   Max: 2
 
-Metrics/LineLength:
+Layout/LineLength:
   AllowURI: true
   Enabled: false
 
@@ -29,10 +32,10 @@ Metrics/ParameterLists:
 
 Style/CollectionMethods:
   PreferredMethods:
-    map:      'collect'
-    reduce:   'inject'
-    find:     'detect'
-    find_all: 'select'
+    map: "collect"
+    reduce: "inject"
+    find: "detect"
+    find_all: "select"
 
 Style/Documentation:
   Enabled: false
@@ -53,15 +56,15 @@ Layout/SpaceInsideHashLiteralBraces:
   EnforcedStyle: no_space
 
 Style/TrailingCommaInArguments:
-  EnforcedStyleForMultiline: 'comma'
+  EnforcedStyleForMultiline: "comma"
 
 Style/TrailingCommaInArrayLiteral:
-  EnforcedStyleForMultiline: 'comma'
+  EnforcedStyleForMultiline: "comma"
 
 Style/TrailingCommaInHashLiteral:
-  EnforcedStyleForMultiline: 'comma'
+  EnforcedStyleForMultiline: "comma"
 
-Style/FileName:
+Naming/FileName:
   Exclude:
     - Rakefile
     - Gemfile
diff --git a/Gemfile b/Gemfile
index 621ba6f..f69d498 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,6 +7,7 @@ gem 'jruby-openssl', platforms: :jruby
 gem 'json', platforms: :mri_19
 
 group :development do
+  gem 'bundler'
   gem 'kramdown'
 end
 
diff --git a/instapaper.gemspec b/instapaper.gemspec
index 6c6f97b..671489a 100644
--- a/instapaper.gemspec
+++ b/instapaper.gemspec
@@ -8,7 +8,6 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'multi_json', '~> 1'
   spec.add_dependency 'simple_oauth', '~> 0.3'
   spec.add_dependency 'virtus', '~> 1'
-  spec.add_development_dependency 'bundler'
   spec.author        = 'Steve Agalloco'
   spec.description   = "Ruby Client for Instapaper's Full API"
   spec.email         = 'steve.agalloco@gmail.com'
@@ -20,4 +19,5 @@ Gem::Specification.new do |spec|
   spec.required_ruby_version = '>= 2.0.0'
   spec.summary       = 'Ruby Instapaper Client'
   spec.version       = Instapaper::VERSION
+  spec.metadata['rubygems_mfa_required'] = 'true'
 end
diff --git a/lib/instapaper/api/folders.rb b/lib/instapaper/api/folders.rb
index ad4c435..a2dc63a 100644
--- a/lib/instapaper/api/folders.rb
+++ b/lib/instapaper/api/folders.rb
@@ -18,7 +18,7 @@ def add_folder(title)
 
       # Deletes the folder and moves any articles in it to the Archive.
       # @param folder_id [String] The id of the folder.
-      def delete_folder(folder_id)
+      def delete_folder(folder_id) # rubocop:disable Naming/PredicateMethod
         perform_post_with_unparsed_response('/api/1.1/folders/delete', folder_id: folder_id)
         true
       end
@@ -27,7 +27,7 @@ def delete_folder(folder_id)
       # @param order [Array] An array of folder_id:position pairs joined by commas.
       # @example Ordering folder_ids 100, 200, and 300
       #   Instapaper.set_order(['100:1','200:2','300:3'])
-      def set_order(order = []) # rubocop:disable Naming/AccessorMethodName
+      def set_order(order = [])
         perform_post_with_objects('/api/1.1/folders/set_order', {order: order.join(',')}, Instapaper::Folder)
       end
     end
diff --git a/lib/instapaper/api/highlights.rb b/lib/instapaper/api/highlights.rb
index b39e94c..d6e1b5a 100644
--- a/lib/instapaper/api/highlights.rb
+++ b/lib/instapaper/api/highlights.rb
@@ -24,7 +24,7 @@ def add_highlight(bookmark_id, options = {})
       # Delete a highlight
       # @param highlight_id [String, Integer]
       # @return [Boolean]
-      def delete_highlight(highlight_id, options = {})
+      def delete_highlight(highlight_id, options = {}) # rubocop:disable Naming/PredicateMethod
         perform_post_with_unparsed_response("/api/1.1/highlights/#{highlight_id}/delete", options)
         true
       end
diff --git a/lib/instapaper/bookmark_list.rb b/lib/instapaper/bookmark_list.rb
index 777d490..5307a56 100644
--- a/lib/instapaper/bookmark_list.rb
+++ b/lib/instapaper/bookmark_list.rb
@@ -8,9 +8,9 @@ class BookmarkList
 
     values do
       attribute :user, Instapaper::User
-      attribute :bookmarks, Array[Instapaper::Bookmark]
-      attribute :highlights, Array[Instapaper::Highlight]
-      attribute :delete_ids, Array[Integer]
+      attribute :bookmarks, [Instapaper::Bookmark]
+      attribute :highlights, [Instapaper::Highlight]
+      attribute :delete_ids, [Integer]
     end
 
     def each(&block)
diff --git a/lib/instapaper/http/utils.rb b/lib/instapaper/http/utils.rb
index 972fa6e..8a19522 100644
--- a/lib/instapaper/http/utils.rb
+++ b/lib/instapaper/http/utils.rb
@@ -42,7 +42,7 @@ def perform_post_with_object(path, options, klass)
       # @param klass [Class]
       def perform_request_with_object(request_method, path, options, klass)
         response = perform_request(request_method, path, options)
-        response = response.is_a?(Array) ? response.first : response
+        response = response.first if response.is_a?(Array)
         klass.new(coerce_hash(response))
       end
 
diff --git a/spec/instapaper/http/response_spec.rb b/spec/instapaper/http/response_spec.rb
index 28f5967..d206ae9 100644
--- a/spec/instapaper/http/response_spec.rb
+++ b/spec/instapaper/http/response_spec.rb
@@ -30,12 +30,15 @@ def parse(_)
 
   describe '#valid?' do
     context 'when http error' do
+      it 'should be invalid'
     end
 
     context 'when body unparseable' do
+      it 'should be invalid'
     end
 
     context 'when error in body' do
+      it 'should be invalid'
     end
   end
 end