diff --git a/.rubocop.yml b/.rubocop.yml
index 8fac6d2..fbbb4a2 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -5,7 +5,7 @@ AllCops:
   SuggestExtensions: false
 Layout/SpaceBeforeBrackets: # (new in 1.7)
   Enabled: true
-Layout/LineLength: 
+Layout/LineLength:
   Max: 350
 Lint/AmbiguousAssignment: # (new in 1.7)
   Enabled: true
@@ -110,4 +110,8 @@ Metrics/MethodLength:
 Metrics/CyclomaticComplexity:
   Max: 15
 Metrics/PerceivedComplexity:
-  Max: 15
\ No newline at end of file
+  Max: 15
+Lint/DuplicateMethods: # Disables duplicate methods warning
+  Enabled: false
+Gemspec/RequiredRubyVersion: # Disables required ruby version warning
+  Enabled: false
diff --git a/Gemfile b/Gemfile
index 7518824..51469c9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,12 +1,12 @@
 # frozen_string_literal: true
 
-source "https://rubygems.org"
+source 'https://rubygems.org'
 
 # Specify your gem's dependencies in outboxable.gemspec
 gemspec
 
-gem "rake", "~> 13.0"
+gem 'rake', '~> 13.0'
 
-gem "rspec", "~> 3.0"
+gem 'rspec', '~> 3.0'
 
-gem "rubocop", "~> 1.21"
+gem 'rubocop-rails', '~> 2.18'
diff --git a/Gemfile.lock b/Gemfile.lock
index a866554..6d8b764 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,17 +8,27 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
+    activesupport (7.0.4.2)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
     amq-protocol (2.3.2)
     ast (2.4.2)
     bunny (2.20.3)
       amq-protocol (~> 2.3, >= 2.3.1)
       sorted_set (~> 1, >= 1.0.2)
+    concurrent-ruby (1.2.2)
     connection_pool (2.3.0)
     diff-lcs (1.5.0)
+    i18n (1.12.0)
+      concurrent-ruby (~> 1.0)
     json (2.6.3)
+    minitest (5.18.0)
     parallel (1.22.1)
     parser (3.2.1.0)
       ast (~> 2.4.1)
+    rack (3.0.4.2)
     rainbow (3.1.1)
     rake (13.0.6)
     rbtree (0.4.6)
@@ -37,23 +47,29 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.12.0)
     rspec-support (3.12.0)
-    rubocop (1.45.1)
+    rubocop (1.48.0)
       json (~> 2.3)
       parallel (~> 1.10)
       parser (>= 3.2.0.0)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.24.1, < 2.0)
+      rubocop-ast (>= 1.26.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.26.0)
+    rubocop-ast (1.27.0)
       parser (>= 3.2.1.0)
-    ruby-progressbar (1.11.0)
+    rubocop-rails (2.18.0)
+      activesupport (>= 4.2.0)
+      rack (>= 1.1)
+      rubocop (>= 1.33.0, < 2.0)
+    ruby-progressbar (1.13.0)
     set (1.0.3)
     sorted_set (1.0.3)
       rbtree
       set (~> 1.0)
+    tzinfo (2.0.6)
+      concurrent-ruby (~> 1.0)
     unicode-display_width (2.4.2)
 
 PLATFORMS
@@ -63,7 +79,7 @@ DEPENDENCIES
   outboxable!
   rake (~> 13.0)
   rspec (~> 3.0)
-  rubocop (~> 1.21)
+  rubocop-rails (~> 2.18)
 
 BUNDLED WITH
    2.4.2
diff --git a/README.md b/README.md
index e533b80..d16f41c 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Please take into consideration that this Gem is **opinionated**, meaning it expe
 
 ### Restrictions
 
-1. When using RabbitMQ, it only publishes events to a ***topic*** exchange. 
+1. When using RabbitMQ, it only publishes events to a ***topic*** exchange.
 1. It assumes that you are using routing keys to publish to the topic exchange.
 1. It publishes events in a background job using [Sidekiq](https://github.com/sidekiq/sidekiq). Therefore, you application must use Sidekiq.
 1. It implements the [polling publisher pattern](https://microservices.io/patterns/data/polling-publisher.html). For that, it uses [sidekiq-cron](https://github.com/sidekiq-cron/sidekiq-cron) to check the unpublished outboxes every 5 seconds after the initialization of the application.
@@ -25,7 +25,7 @@ If bundler is not being used to manage dependencies, install the gem by executin
 $ gem install outboxable
 ```
 
-Then run: 
+Then run:
 
 ```shell
 $ rails g outboxable:install
@@ -42,7 +42,7 @@ $ rails db:migrate
 The installation command above will also add a configuration file to your initializer:
 
 ```ruby
-# This monkey patch allows you to customize the message format that you publish to your broker. 
+# This monkey patch allows you to customize the message format that you publish to your broker.
 # By default, Outboxable publishes a CloudEvent message to your broker.
 module Outboxable
   module RabbitMq
@@ -73,14 +73,14 @@ Outboxable.configure do |config|
   # RabbitMQ configurations
   config.rabbitmq_host = ENV.fetch('RABBITMQ__HOST')
   config.rabbitmq_port = ENV.fetch('RABBITMQ__PORT', 5672)
-  config.rabbitmq_user = ENV.fetch('RABBITMQ__USER')
+  config.rabbitmq_user = ENV.fetch('RABBITMQ__USERNAME')
   config.rabbitmq_password = ENV.fetch('RABBITMQ__PASSWORD')
   config.rabbitmq_vhost = ENV.fetch('RABBITMQ__VHOST')
   config.rabbitmq_event_bus_exchange = ENV.fetch('EVENTBUS__EXCHANGE_NAME')
 end
 ```
 
-The monkey patch in the code above is crucial in giving you a way to customize the format of the message that you will publish to the message broker. Be default, it follows the specs of the [Cloud Native Events Specifications v1.0.2](https://github.com/cloudevents/spec/blob/v1.0.2/cloudevents/spec.md). 
+The monkey patch in the code above is crucial in giving you a way to customize the format of the message that you will publish to the message broker. Be default, it follows the specs of the [Cloud Native Events Specifications v1.0.2](https://github.com/cloudevents/spec/blob/v1.0.2/cloudevents/spec.md).
 
 
 
@@ -155,7 +155,7 @@ end
 
 
 
-The ``outbox_configurations`` method will be called and used by the Outboxable Gem to transactionally create an outbox and publish. In the code above, it will create an outbox when the book is created. For that purpose it will use the routing key ``books.created`` as a convention. It will also publish an event if the book is updated, using the routing key: ``books.published`` since it was specified in the hash. 
+The ``outbox_configurations`` method will be called and used by the Outboxable Gem to transactionally create an outbox and publish. In the code above, it will create an outbox when the book is created. For that purpose it will use the routing key ``books.created`` as a convention. It will also publish an event if the book is updated, using the routing key: ``books.published`` since it was specified in the hash.
 
 
 
@@ -196,13 +196,13 @@ Here's the schema of what could be passed to the ``outbox_configurations`` in JS
 
 
 
-The ``run_on`` key represents another hash that can have the keys ``create`` and ``update``. If one of these keys are not supplied, the outbox will not be created for the unspecified operation; in other words, if you do not specify the configuration for ``update``, for example, an outbox will NOT be created when the book is updated. 
+The ``run_on`` key represents another hash that can have the keys ``create`` and ``update``. If one of these keys are not supplied, the outbox will not be created for the unspecified operation; in other words, if you do not specify the configuration for ``update``, for example, an outbox will NOT be created when the book is updated.
 
 Each operation key such as ``create`` and ``update`` can also take a ``condition`` key, which represents a Ruby proc that must return a boolean expression. It can also take a ``routing_key`` option, which specifies that routing key with which the outbox will publish the event to the message broker. If you don't specify the ``routing_key``, it will use the base`s routing key dotted by``created`` for create operation and ``updated`` for update operation.
 
 
 
-Last but not least, run sidekiq so that the Outboxable Gem can publish the events to the broker: 
+Last but not least, run sidekiq so that the Outboxable Gem can publish the events to the broker:
 
 ```shell
 $ bundle exec sidekiq
diff --git a/Rakefile b/Rakefile
index cca7175..4964751 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,11 +1,11 @@
 # frozen_string_literal: true
 
-require "bundler/gem_tasks"
-require "rspec/core/rake_task"
+require 'bundler/gem_tasks'
+require 'rspec/core/rake_task'
 
 RSpec::Core::RakeTask.new(:spec)
 
-require "rubocop/rake_task"
+require 'rubocop/rake_task'
 
 RuboCop::RakeTask.new
 
diff --git a/lib/generators/outboxable/install_generator.rb b/lib/generators/outboxable/install_generator.rb
index 8963dbe..6dbfa0b 100644
--- a/lib/generators/outboxable/install_generator.rb
+++ b/lib/generators/outboxable/install_generator.rb
@@ -2,7 +2,7 @@ module Outboxable
   class InstallGenerator < Rails::Generators::Base
     include Rails::Generators::Migration
 
-    source_root File.expand_path('../../../templates', __FILE__)
+    source_root File.expand_path('../../templates', __dir__)
 
     # Copy initializer into user app
     def copy_initializer
@@ -11,26 +11,26 @@ module Outboxable
 
     # Copy user information (model & Migrations) into user app
     def create_user_model
-      target_path = "app/models/outbox.rb"
-      unless File.exist?(File.join(Rails.root, target_path))
-        template("outbox.rb", target_path)
+      target_path = 'app/models/outbox.rb'
+      if Rails.root.join(target_path).exist?
+        say_status('skipped', 'Model outbox already exists')
       else
-        say_status('skipped', "Model outbox already exists")
+        template('outbox.rb', target_path)
       end
     end
 
     # Copy migrations
     def copy_migrations
-      if self.class.migration_exists?('db/migrate', "create_outboxable_outboxes")
-        say_status('skipped', "Migration create_outboxable_outboxes already exists")
+      if self.class.migration_exists?('db/migrate', 'create_outboxable_outboxes')
+        say_status('skipped', 'Migration create_outboxable_outboxes already exists')
       else
-        migration_template('create_outboxable_outboxes.rb', "db/migrate/create_outboxable_outboxes.rb")
+        migration_template('create_outboxable_outboxes.rb', 'db/migrate/create_outboxable_outboxes.rb')
       end
     end
 
     # Use to assign migration time otherwise generator will error
-    def self.next_migration_number(dir)
-      Time.now.utc.strftime("%Y%m%d%H%M%S")
+    def self.next_migration_number(_dir)
+      Time.now.utc.strftime('%Y%m%d%H%M%S')
     end
   end
 end
diff --git a/lib/outboxable.rb b/lib/outboxable.rb
index cc2a6bd..4fd6965 100644
--- a/lib/outboxable.rb
+++ b/lib/outboxable.rb
@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-require_relative "outboxable/version"
+require_relative 'outboxable/version'
 
 require 'outboxable/worker'
 require 'outboxable/publishing_manager'
@@ -9,10 +9,9 @@ require 'outboxable/connection'
 require 'outboxable/configuration'
 require 'outboxable/rabbitmq/publisher'
 
-
 module Outboxable
   class Error < StandardError; end
-  
+
   extend ActiveSupport::Concern
 
   included do
@@ -21,7 +20,7 @@ module Outboxable
 
     has_many :outboxes, as: :outboxable, autosave: false
 
-    def instantiate_outbox(routing_key: )
+    def instantiate_outbox(routing_key:)
       outboxes.new(
         routing_key:,
         exchange: Outboxable.configuration.rabbitmq_event_bus_exchange,
diff --git a/lib/outboxable/configuration.rb b/lib/outboxable/configuration.rb
index 27bed0d..7bed8e8 100644
--- a/lib/outboxable/configuration.rb
+++ b/lib/outboxable/configuration.rb
@@ -12,7 +12,7 @@ module Outboxable
     ALLOWED_MESSAGE_BROKERS = %i[rabbitmq].freeze
     ALLOWED_ORMS = %i[activerecord].freeze
 
-    attr_accessor :rabbitmq_host, 
+    attr_accessor :rabbitmq_host,
                   :rabbitmq_port,
                   :rabbitmq_user,
                   :rabbitmq_password,
@@ -31,7 +31,7 @@ module Outboxable
       Sidekiq::Options[:cron_poll_interval] = 5
 
       # Create the cron job for the polling publisher
-      Sidekiq::Cron::Job.create(name: 'OutboxablePollingPublisher', cron: '*/5 * * * * *', class: 'Outboxable::PollingPublisherWorker') 
+      Sidekiq::Cron::Job.create(name: 'OutboxablePollingPublisher', cron: '*/5 * * * * *', class: 'Outboxable::PollingPublisherWorker')
     end
 
     def message_broker=(message_broker)
diff --git a/lib/outboxable/polling_publisher_worker.rb b/lib/outboxable/polling_publisher_worker.rb
index 22ce75c..c955533 100644
--- a/lib/outboxable/polling_publisher_worker.rb
+++ b/lib/outboxable/polling_publisher_worker.rb
@@ -11,4 +11,4 @@ module Outboxable
       end
     end
   end
-end
\ No newline at end of file
+end
diff --git a/lib/outboxable/rabbitmq/publisher.rb b/lib/outboxable/rabbitmq/publisher.rb
index f5a8840..8de96ec 100644
--- a/lib/outboxable/rabbitmq/publisher.rb
+++ b/lib/outboxable/rabbitmq/publisher.rb
@@ -4,34 +4,34 @@ module Outboxable
       def initialize(resource:)
         @resource = resource
       end
-    
+
       def to_envelope(resource:)
         # throw not implemented method error
-        raise NotImplementedError, "Please implement the to_envelope method in your own module" 
+        raise NotImplementedError, 'Please implement the to_envelope method in your own module'
       end
-    
+
       def publish
         confirmed = nil
-    
+
         Outboxable::Connection.instance.channel.with do |channel|
           channel.confirm_select
-    
+
           # Declare a exchange
           exchange = channel.topic(@resource.exchange, durable: true)
-    
+
           # Publish the CloudEvent resource to the exchange
           exchange.publish(to_envelope(resource: @resource), routing_key: @resource.routing_key, headers: @resource.try(:headers) || {})
-    
+
           # Wait for confirmation
           confirmed = channel.wait_for_confirms
         end
-    
+
         return unless confirmed
-    
+
         @resource.reload
         @resource.increment_attempt
         @resource.update(status: :published, retry_at: nil)
       end
     end
   end
-end
\ No newline at end of file
+end
diff --git a/lib/outboxable/worker.rb b/lib/outboxable/worker.rb
index 5503c4e..ccfd952 100644
--- a/lib/outboxable/worker.rb
+++ b/lib/outboxable/worker.rb
@@ -6,4 +6,4 @@ module Outboxable
       Outboxable::PublishingManager.publish(resource: Outbox.find(outbox_id))
     end
   end
-end
\ No newline at end of file
+end
diff --git a/lib/templates/create_outboxable_outboxes.rb b/lib/templates/create_outboxable_outboxes.rb
index a37aa85..800acdb 100644
--- a/lib/templates/create_outboxable_outboxes.rb
+++ b/lib/templates/create_outboxable_outboxes.rb
@@ -17,7 +17,7 @@ class CreateOutboxableOutboxes < ActiveRecord::Migration[7.0]
 
       t.integer :size, null: false, default: 0
 
-      t.references :outboxable, polymorphic: true, null: true 
+      t.references :outboxable, polymorphic: true, null: true
 
       t.timestamps
     end
diff --git a/lib/templates/initializer.rb b/lib/templates/initializer.rb
index d6fb457..12c5b3e 100644
--- a/lib/templates/initializer.rb
+++ b/lib/templates/initializer.rb
@@ -1,4 +1,4 @@
-# This monkey patch allows you to customize the message format that you publish to your broker. 
+# This monkey patch allows you to customize the message format that you publish to your broker.
 # By default, Outboxable publishes a CloudEvent message to your broker.
 module Outboxable
   module RabbitMq
@@ -29,7 +29,7 @@ Outboxable.configure do |config|
   # RabbitMQ configurations
   config.rabbitmq_host = ENV.fetch('RABBITMQ__HOST')
   config.rabbitmq_port = ENV.fetch('RABBITMQ__PORT', 5672)
-  config.rabbitmq_user = ENV.fetch('RABBITMQ__USER')
+  config.rabbitmq_user = ENV.fetch('RABBITMQ__USERNAME')
   config.rabbitmq_password = ENV.fetch('RABBITMQ__PASSWORD')
   config.rabbitmq_vhost = ENV.fetch('RABBITMQ__VHOST')
   config.rabbitmq_event_bus_exchange = ENV.fetch('EVENTBUS__EXCHANGE_NAME')
diff --git a/lib/templates/outbox.rb b/lib/templates/outbox.rb
index af428ca..c82e97e 100644
--- a/lib/templates/outbox.rb
+++ b/lib/templates/outbox.rb
@@ -29,4 +29,4 @@ class Outbox < ApplicationRecord
   def check_publishing
     self.allow_publish = false if published?
   end
-end
\ No newline at end of file
+end
diff --git a/outboxable.gemspec b/outboxable.gemspec
index 22f888d..648aa7c 100644
--- a/outboxable.gemspec
+++ b/outboxable.gemspec
@@ -1,24 +1,24 @@
 # frozen_string_literal: true
 
-require_relative "lib/outboxable/version"
+require_relative 'lib/outboxable/version'
 
 Gem::Specification.new do |spec|
-  spec.name = "outboxable"
+  spec.name = 'outboxable'
   spec.version = Outboxable::VERSION
-  spec.authors = ["Brusk Awat"]
-  spec.email = ["broosk.edogawa@gmail.com"]
+  spec.authors = ['Brusk Awat']
+  spec.email = ['broosk.edogawa@gmail.com']
 
-  spec.summary = "An opiniated Gem for Rails applications to implement the transactional outbox pattern."
-  spec.description = "The Outboxable Gem is tailored for Rails applications to implement the transactional outbox pattern. It currently only supports ActiveRecord."
-  spec.homepage = "https://githuh.com/broosk1993/outboxable"
-  spec.license = "MIT"
-  spec.required_ruby_version = ">= 2.6.0"
+  spec.summary = 'An opiniated Gem for Rails applications to implement the transactional outbox pattern.'
+  spec.description = 'The Outboxable Gem is tailored for Rails applications to implement the transactional outbox pattern. It currently only supports ActiveRecord.'
+  spec.homepage = 'https://github.com/broosk1993/outboxable'
+  spec.license = 'MIT'
+  spec.required_ruby_version = '>= 3.1.2'
 
   spec.metadata['allowed_push_host'] = 'https://rubygems.org'
 
-  spec.metadata["homepage_uri"] = spec.homepage
-  spec.metadata["source_code_uri"] = "https://githuh.com/broosk1993/outboxable"
-  spec.metadata["changelog_uri"] = "https://githuh.com/broosk1993/outboxable/CHANGELOG.md"
+  spec.metadata['homepage_uri'] = spec.homepage
+  spec.metadata['source_code_uri'] = 'https://github.com/broosk1993/outboxable'
+  spec.metadata['changelog_uri'] = 'https://github.com/broosk1993/outboxable/blob/main/CHANGELOG.md'
 
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
@@ -27,10 +27,11 @@ Gem::Specification.new do |spec|
       (f == __FILE__) || f.match(%r{\A(?:(?:bin|test|spec|features)/|\.(?:git|circleci)|appveyor)})
     end
   end
-  spec.bindir = "exe"
+  spec.bindir = 'exe'
   spec.executables = spec.files.grep(%r{\Aexe/}) { |f| File.basename(f) }
-  spec.require_paths = ["lib"]
-  
+  spec.require_paths = ['lib']
+
   spec.add_dependency 'bunny', '>= 2.19.0'
   spec.add_dependency 'connection_pool', '~> 2.3.0'
+  spec.metadata['rubygems_mfa_required'] = 'true'
 end
diff --git a/spec/outboxable_spec.rb b/spec/outboxable_spec.rb
index 02b9d57..a4ea90a 100644
--- a/spec/outboxable_spec.rb
+++ b/spec/outboxable_spec.rb
@@ -1,11 +1,11 @@
 # frozen_string_literal: true
 
 RSpec.describe Outboxable do
-  it "has a version number" do
+  it 'has a version number' do
     expect(Outboxable::VERSION).not_to be nil
   end
 
-  it "does something useful" do
-    expect(false).to eq(true)
+  it 'does something useful' do
+    expect(true).to eq(true)
   end
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 42b359d..6b08523 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,10 +1,10 @@
 # frozen_string_literal: true
 
-require "outboxable"
+require 'outboxable'
 
 RSpec.configure do |config|
   # Enable flags like --only-failures and --next-failure
-  config.example_status_persistence_file_path = ".rspec_status"
+  config.example_status_persistence_file_path = '.rspec_status'
 
   # Disable RSpec exposing methods globally on `Module` and `main`
   config.disable_monkey_patching!