diff --git a/.rubocop.yml b/.rubocop.yml
index 689b3ca36..2bbf1228c 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -241,3 +241,7 @@ Style/StringLiterals:
     - bin/rubocop
     - config/initializers/new_framework_defaults_7_2.rb
     - config/puma.rb
+
+# The new Ruby version 3.4 enforces frozen string literals by default
+Style/FrozenStringLiteralComment:
+  Enabled: false
diff --git a/bin/setup b/bin/setup
index 690ca6a5b..d7fc86941 100755
--- a/bin/setup
+++ b/bin/setup
@@ -2,7 +2,7 @@
 require "fileutils"
 
 APP_ROOT = File.expand_path("..", __dir__)
-APP_NAME = "laa-court-data-ui"
+APP_NAME = "laa-court-data-ui".freeze
 
 def system!(*args)
   system(*args, exception: true)
diff --git a/config/application.rb b/config/application.rb
index c06871f0f..e9c286333 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -41,11 +41,11 @@ class Application < Rails::Application
 
     config.exceptions_app = routes
     config.active_job.queue_adapter = :sidekiq
-    config.x.support_email_address = 'access-court-data-team@digital.justice.gov.uk'
-    config.x.display_raw_responses = %w[enabled true].include?(ENV.fetch('DISPLAY_RAW_RESPONSES', nil))
+    config.x.support_email_address = "access-court-data-team@digital.justice.gov.uk"
+    config.x.display_raw_responses = %w[enabled true].include?(ENV.fetch("DISPLAY_RAW_RESPONSES", nil))
     config.action_mailer.deliver_later_queue_name = :mailers
-    config.x.court_data_api_config.uri = ENV.fetch('COURT_DATA_API_URL', nil)
-    config.x.court_data_api_config.user = ENV.fetch('COURT_DATA_API_USERNAME', nil)
-    config.x.court_data_api_config.secret = ENV.fetch('COURT_DATA_API_SECRET', nil)
+    config.x.court_data_api_config.uri = ENV.fetch("COURT_DATA_API_URL", nil)
+    config.x.court_data_api_config.user = ENV.fetch("COURT_DATA_API_USERNAME", nil)
+    config.x.court_data_api_config.secret = ENV.fetch("COURT_DATA_API_SECRET", nil)
   end
 end
diff --git a/config/environments/development.rb b/config/environments/development.rb
index 527e056b2..c24f44dd8 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -82,7 +82,7 @@
   config.logstasher.view_enabled = false
   config.logstasher.job_enabled = true
   config.logstasher.suppress_app_log = false
-  config.logstasher.source = 'laa-court-data-ui-development'
+  config.logstasher.source = "laa-court-data-ui-development"
   config.logstasher.backtrace = true
-  config.logstasher.logger_path = 'log/logstasher_development.log'
+  config.logstasher.logger_path = "log/logstasher_development.log"
 end
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 7199b3960..8e3d2939c 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -22,7 +22,7 @@
 
   # Disable serving static files from the `/public` folder by default since
   # Apache or NGINX already handles this.
-  config.public_file_server.enabled = ENV.fetch('RAILS_SERVE_STATIC_FILES', nil).present?
+  config.public_file_server.enabled = ENV.fetch("RAILS_SERVE_STATIC_FILES", nil).present?
 
   # Enable serving of images, stylesheets, and JavaScripts from an asset server.
   # config.asset_host = "http://assets.example.com"
@@ -60,7 +60,7 @@
   # Ignore bad email addresses and do not raise email delivery errors.
   # Set this to true and configure the email server for immediate delivery to raise delivery errors.
   config.action_mailer.raise_delivery_errors = false
-  config.action_mailer.default_url_options = { host: ENV.fetch('DOMAIN_URL', nil) }
+  config.action_mailer.default_url_options = { host: ENV.fetch("DOMAIN_URL", nil) }
 
   # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
   # the I18n.default_locale when a translation cannot be found).
@@ -73,7 +73,7 @@
   config.active_record.dump_schema_after_migration = false
 
   # Only use :id for inspections in production.
-  config.active_record.attributes_for_inspect = [ :id ]
+  config.active_record.attributes_for_inspect = [:id]
 
   # Enable DNS rebinding protection and other `Host` header attacks.
   # config.hosts = [
diff --git a/config/environments/test.rb b/config/environments/test.rb
index da299811f..da82d361c 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -20,7 +20,7 @@
   # Configure public file server for tests with Cache-Control for performance.
   config.public_file_server.enabled = true
   config.public_file_server.headers = {
-    'Cache-Control' => "public, max-age=#{1.hour.to_i}"
+    "Cache-Control" => "public, max-age=#{1.hour.to_i}"
   }
 
   # Don't care if the mailer can't send.
@@ -73,9 +73,9 @@
     config.logstasher.view_enabled = false
     config.logstasher.job_enabled = true
     config.logstasher.suppress_app_log = false
-    config.logstasher.source = 'laa-court-data-ui-test'
+    config.logstasher.source = "laa-court-data-ui-test"
     config.logstasher.backtrace = true
-    config.logstasher.logger_path = 'log/logstasher_test.log'
+    config.logstasher.logger_path = "log/logstasher_test.log"
   end
 
   # Annotate rendered view with file names.
diff --git a/config/initializers/filter_parameter_logging.rb b/config/initializers/filter_parameter_logging.rb
index f025d8d5a..7f9cf478d 100644
--- a/config/initializers/filter_parameter_logging.rb
+++ b/config/initializers/filter_parameter_logging.rb
@@ -3,6 +3,6 @@
 # Configure parameters to be partially matched (e.g. passw matches password) and filtered from the log file.
 # Use this to limit dissemination of sensitive information.
 # See the ActiveSupport::ParameterFilter documentation for supported notations and behaviors.
-Rails.application.config.filter_parameters += [
-  :passw, :password, :email, :secret, :token, :_key, :crypt, :salt, :certificate, :otp, :ssn
+Rails.application.config.filter_parameters += %i[
+  passw password email secret token _key crypt salt certificate otp ssn
 ]
diff --git a/config/initializers/inflections.rb b/config/initializers/inflections.rb
index 1414a2d62..b8261dc74 100644
--- a/config/initializers/inflections.rb
+++ b/config/initializers/inflections.rb
@@ -13,5 +13,5 @@
 # These inflection rules are supported but not enabled by default:
 ActiveSupport::Inflector.inflections(:en) do |inflect|
   # inflect.acronym 'RESTful'
-  inflect.acronym 'MAAT'
+  inflect.acronym "MAAT"
 end