diff --git a/.gem_release.yml b/.gem_release.yml
new file mode 100644
index 000000000..420d0289c
--- /dev/null
+++ b/.gem_release.yml
@@ -0,0 +1,2 @@
+bump:
+  file: "lib/spree_i18n/version.rb"
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 452ebb342..c496bc7ad 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -1,7 +1,11 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
 version: 2
 updates:
-- package-ecosystem: bundler
-  directory: "/"
-  schedule:
-    interval: daily
-  open-pull-requests-limit: 10
+  - package-ecosystem: "bundler" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 000000000..c5cc96d14
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,77 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  tests:
+    name: Tests (${{ matrix.db }})
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        db: [postgres, mysql]
+        include:
+          - db: postgres
+            database_url: postgres://postgres:password@localhost:5432/spree_test
+          - db: mysql
+            database_url: mysql2://root:password@127.0.0.1:3306/spree_test
+    services:
+      postgres:
+        image: postgres:16
+        env:
+          POSTGRES_PASSWORD: password
+          POSTGRES_DB: spree_test
+        ports: ['5432:5432']
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+      mysql:
+        image: mysql:8.0
+        env:
+          MYSQL_ROOT_PASSWORD: password
+          MYSQL_DATABASE: spree_test
+        ports: ['3306:3306']
+        options: >-
+          --health-cmd "mysqladmin ping -h 127.0.0.1"
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+    env:
+      DB: ${{ matrix.db }}
+      DATABASE_URL: ${{ matrix.database_url }}
+      RAILS_ENV: test
+      CI: true
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.3'
+          bundler-cache: true
+      - name: Install libvips
+        run: sudo apt-get update && sudo apt-get install -y libvips
+      - name: Create test app
+        run: bundle exec rake test_app
+      - name: Run specs
+        run: bundle exec rspec --format progress --format RspecJunitFormatter --out tmp/test-results/rspec.xml
+
+  brakeman:
+    name: Brakeman
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.3'
+          bundler-cache: true
+      - name: Run Brakeman
+        run: bundle exec brakeman --force --exit-on-warn --exit-on-error
diff --git a/.gitignore b/.gitignore
index 129258e73..8230fcc3c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,6 +5,7 @@
 .idea
 .localeapp/locales
 .project
+.vscode
 coverage
 default
 Gemfile.lock
@@ -18,5 +19,6 @@ spec/dummy
 public/spree
 .ruby-version
 .ruby-gemset
-gemfiles/*.gemfile.lock
 *.gem
+*/*.gem
+.env
diff --git a/.rspec b/.rspec
index d72f9515c..b8f148f0e 100644
--- a/.rspec
+++ b/.rspec
@@ -1,3 +1,2 @@
 --color
 -r spec_helper
--f documentation
diff --git a/.rubocop.yml b/.rubocop.yml
index 8d8a6d4a4..c0e407254 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,7 +1,21 @@
----
-inherit_from: .hound.yml
-
 AllCops:
+  DisplayCopNames: true
+  TargetRubyVersion: 3.2
+  Include:
+    - '**/Gemfile'
+    - '**/Rakefile'
   Exclude:
-    - spec/dummy/**/*
-    - bin/*
+    - 'spec/dummy/**/*'
+    - 'lib/generators/**/*'
+    - 'bin/*'
+
+Layout/LineLength:
+  Max: 150
+
+# DISABLED
+
+Style/Documentation:
+  Enabled: false
+
+Style/FrozenStringLiteralComment:
+  Enabled: false
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 15583c588..000000000
--- a/.travis.yml
+++ /dev/null
@@ -1,44 +0,0 @@
-os: linux
-dist: bionic
-
-addons:
-  apt:
-    sources:
-      - google-chrome
-    packages:
-      - google-chrome-stable
-
-services:
-  - mysql
-  - postgresql
-
-language: ruby
-
-rvm:
-  - 2.7
-  - 3.0
-
-env:
-  - DB=mysql
-  - DB=postgres
-
-gemfile:
-  - gemfiles/spree_4_2.gemfile
-  - gemfiles/spree_master.gemfile
-
-jobs:
-  allow_failures:
-    - gemfile: gemfiles/spree_master.gemfile
-
-before_install:
-  - mysql -u root -e "GRANT ALL ON *.* TO 'travis'@'%';"
-
-before_script:
-  - CHROME_MAIN_VERSION=`google-chrome-stable --version | sed -E 's/(^Google Chrome |\.[0-9]+ )//g'`
-  - CHROMEDRIVER_VERSION=`curl -s "https://chromedriver.storage.googleapis.com/LATEST_RELEASE_$CHROME_MAIN_VERSION"`
-  - curl "https://chromedriver.storage.googleapis.com/${CHROMEDRIVER_VERSION}/chromedriver_linux64.zip" -O
-  - unzip chromedriver_linux64.zip -d ~/bin
-
-script:
-  - bundle exec rake test_app
-  - bundle exec rake spec
diff --git a/Appraisals b/Appraisals
deleted file mode 100644
index 828b05768..000000000
--- a/Appraisals
+++ /dev/null
@@ -1,9 +0,0 @@
-appraise 'spree-4-2' do
-  gem 'spree', '~> 4.2.0.rc3'
-  gem 'rails-controller-testing'
-end
-
-appraise 'spree-master' do
-  gem 'spree', github: 'spree/spree', branch: 'master'
-  gem 'rails-controller-testing'
-end
\ No newline at end of file
diff --git a/Gemfile b/Gemfile
index 66b1b4539..b2132c645 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,29 @@
 source 'https://rubygems.org'
 
-gem "rails-controller-testing"
-gem 'spree', github: 'spree/spree', branch: 'main'
+git_source(:github) do |repo_name|
+  repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?('/')
+  "https://github.com/#{repo_name}.git"
+end
+
+gem 'rails-controller-testing'
+
+spree_opts = if ENV['SPREE_PATH']
+                { 'path': ENV['SPREE_PATH'] }
+             else
+                { 'github': 'spree/spree', 'branch': 'main' }
+             end
+gem 'spree', spree_opts
+
+gem 'spree_dev_tools', '>= 0.6.0.rc1'
+
+if ENV['DB'] == 'mysql'
+  gem 'mysql2'
+elsif ENV['DB'] == 'postgres'
+  gem 'pg'
+else
+  gem 'sqlite3'
+end
+
+gem 'propshaft'
 
 gemspec
diff --git a/README.md b/README.md
index 244f186dd..4a0d2e67e 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,6 @@
 # Spree Internationalization
 
-[![Build Status](https://travis-ci.org/spree-contrib/spree_i18n.svg?branch=master)](https://travis-ci.org/spree-contrib/spree_i18n)
-[![Code Climate](https://codeclimate.com/github/spree-contrib/spree_i18n/badges/gpa.svg)](https://codeclimate.com/github/spree-contrib/spree_i18n)
+[![CI](https://github.com/spree/spree_i18n/actions/workflows/ci.yml/badge.svg)](https://github.com/spree/spree_i18n/actions/workflows/ci.yml)
 
 This is the Internationalization project for [Spree Commerce][1] 
 
@@ -24,59 +23,56 @@ Spree is developed and maintained by
 1. Add this extension to your Gemfile with this line:
 
   ```ruby
-  gem 'spree_i18n'
+  bundle add spree_i18n
   ```
 
-2. Install the gem using Bundler:
-  ```ruby
-  bundle install
-  ```
+2. Run the install generator
 
-3. Copy & run migrations
   ```ruby
   bundle exec rails g spree_i18n:install
   ```
 
-4. Restart your server
+3. Restart your server
 
   If your server was running, restart it so that it can find the assets properly.
 
-## Upgrading to 5.0 (only Spree 4.2+)
+## Developing
 
-### 1. Remove Asset references
+1. Create a dummy app
 
-From `vendor/assets/javascripts/spree/backend/all.js`
-```
-//= require spree/backend/spree_i18n
-```
+    ```bash
+    bundle update
+    bundle exec rake test_app
+    ```
 
-and from `vendor/assets/javascripts/spree/frontend/all.js`
-```
-//= require spree/frontend/spree_i18n
-```
+2. Add your new code
+3. Run tests
 
-and from `vendor/assets/stylesheets/spree/backend/all.css`
-```
-*= require spree/backend/spree_i18n
-```
+    ```bash
+    bundle exec rspec
+    ```
 
-and from `vendor/assets/stylesheets/spree/frontend/all.css`
-```
-*= require spree/backend/spree_i18n
+## Releasing a new version
+
+```shell
+bundle exec gem bump -p -t
+bundle exec gem release
 ```
 
----
+For more options please see [gem-release README](https://github.com/svenfuchs/gem-release)
 
 ## Contributing
 
-[See corresponding guidelines][7]
+If you'd like to contribute, please take a look at the
+[instructions](CONTRIBUTING.md) for installing dependencies and crafting a good
+pull request.
 
 ---
 
-Copyright (c) 2010-2015 [Spree Commerce Inc.][1] and other [contributors][5]. released under the [New BSD License][6]
+Copyright (c) 2010-2026 [Spree Commerce Inc.][1] and other [contributors][5], released under the [New BSD License][6]
 
 [1]: https://spreecommerce.org
 [2]: https://spreecommerce.org/docs/developer/core-concepts/i18n#internationalization
-[5]: https://github.com/spree-contrib/spree_i18n/graphs/contributors
-[6]: https://github.com/spree-contrib/spree_i18n/blob/master/LICENSE.md
-[7]: https://github.com/spree-contrib/spree_i18n/blob/master/CONTRIBUTING.md
+[5]: https://github.com/spree/spree_i18n/graphs/contributors
+[6]: https://github.com/spree/spree_i18n/blob/main/LICENSE.md
+[7]: https://github.com/spree/spree_i18n/blob/main/CONTRIBUTING.md
diff --git a/Rakefile b/Rakefile
index a7315330f..df64dbb98 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,28 +1,23 @@
-require 'rubygems'
-require 'bundler/setup'
-require 'rake'
-require 'rake/testtask'
-require 'rake/packagetask'
-require 'rubygems/package_task'
-require 'rspec/core/rake_task'
-require 'spree/testing_support/common_rake'
-require 'spree_i18n'
-
+require 'bundler'
 Bundler::GemHelper.install_tasks
-RSpec::Core::RakeTask.new
 
-task default: :spec
+require 'rspec/core/rake_task'
+require 'spree/testing_support/extension_rake'
 
-spec = eval(File.read('spree_i18n.gemspec'))
+RSpec::Core::RakeTask.new
 
-Gem::PackageTask.new(spec) do |p|
-  p.gem_spec = spec
+task :default do
+  if Dir['spec/dummy'].empty?
+    Rake::Task[:test_app].invoke
+    Dir.chdir('../../')
+  end
+  Rake::Task[:spec].invoke
 end
 
 desc 'Generates a dummy app for testing'
 task :test_app do
   ENV['LIB_NAME'] = 'spree_i18n'
-  Rake::Task['common:test_app'].invoke
+  Rake::Task['extension:test_app'].execute
 end
 
 namespace :spree_i18n do
diff --git a/bin/rails b/bin/rails
index b52647766..c81cbae12 100755
--- a/bin/rails
+++ b/bin/rails
@@ -1,4 +1,5 @@
 #!/usr/bin/env ruby
+# This command will automatically be run when you run "rails" from the root of your extension
 
 ENGINE_ROOT = File.expand_path('../..', __FILE__)
 ENGINE_PATH = File.expand_path('../../lib/spree_i18n/engine', __FILE__)
diff --git a/gemfiles/spree_4_2.gemfile b/gemfiles/spree_4_2.gemfile
deleted file mode 100644
index 11901f088..000000000
--- a/gemfiles/spree_4_2.gemfile
+++ /dev/null
@@ -1,8 +0,0 @@
-# This file was generated by Appraisal
-
-source "https://rubygems.org"
-
-gem "rails-controller-testing"
-gem "spree", "~> 4.2.0.rc3"
-
-gemspec path: "../"
diff --git a/gemfiles/spree_master.gemfile b/gemfiles/spree_master.gemfile
deleted file mode 100644
index c3f8398e5..000000000
--- a/gemfiles/spree_master.gemfile
+++ /dev/null
@@ -1,8 +0,0 @@
-# This file was generated by Appraisal
-
-source "https://rubygems.org"
-
-gem "rails-controller-testing"
-gem "spree", github: "spree/spree", branch: "master"
-
-gemspec path: "../"
diff --git a/lib/spree_i18n/version.rb b/lib/spree_i18n/version.rb
index 0de4145ce..8bc8c3be0 100644
--- a/lib/spree_i18n/version.rb
+++ b/lib/spree_i18n/version.rb
@@ -1,17 +1,11 @@
 module SpreeI18n
+  VERSION = '5.3.2'.freeze
+
   module_function
 
   # Returns the version of the currently loaded SpreeI18n as a
   # <tt>Gem::Version</tt>.
   def version
-    Gem::Version.new Version::STRING
-  end
-
-  module Version
-    MAJOR = 5
-    MINOR = 3
-    TINY  = 2
-
-    STRING = [MAJOR, MINOR, TINY].compact.join('.')
+    Gem::Version.new(VERSION)
   end
 end
diff --git a/spree_i18n.gemspec b/spree_i18n.gemspec
index 908afe36c..ce1b817a7 100644
--- a/spree_i18n.gemspec
+++ b/spree_i18n.gemspec
@@ -1,4 +1,4 @@
-# coding: utf-8
+# encoding: UTF-8
 lib = File.expand_path('../lib/', __FILE__)
 $LOAD_PATH.unshift lib unless $LOAD_PATH.include?(lib)
 
@@ -7,25 +7,35 @@ require 'spree_i18n/version'
 Gem::Specification.new do |s|
   s.platform    = Gem::Platform::RUBY
   s.name        = 'spree_i18n'
-  s.version     = SpreeI18n.version
-  s.summary     = 'Provides locale information for use in Spree.'
-  s.description = s.summary
+  s.version     = SpreeI18n::VERSION
+  s.summary     = 'Provides locale information and translations for Spree Commerce.'
+  s.description = 'Adds locale files, country/language names and translation tooling for internationalizing Spree Commerce stores.'
+  s.required_ruby_version = '>= 3.2'
 
-  s.author      = 'Sean Schofield'
-  s.email       = 'sean.schofield@gmail.com'
-  s.homepage    = 'http://spreecommerce.com'
-  s.license     = 'BSD-3'
+  s.author    = 'Vendo Connect Inc.'
+  s.email     = 'hello@spreecommerce.org'
+  s.homepage  = 'https://github.com/spree/spree_i18n'
+  s.license   = 'BSD-3-Clause'
 
-  s.files        = `git ls-files`.split("\n")
-  s.test_files   = `git ls-files -- spec/*`.split("\n")
+  s.metadata = {
+    'bug_tracker_uri' => 'https://github.com/spree/spree_i18n/issues',
+    'changelog_uri' => "https://github.com/spree/spree_i18n/releases/tag/v#{s.version}",
+    'documentation_uri' => 'https://docs.spreecommerce.org/',
+    'source_code_uri' => "https://github.com/spree/spree_i18n/tree/v#{s.version}"
+  }
+
+  s.files        = Dir["{app,config,db,lib,vendor}/**/*", "LICENSE.md", "Rakefile", "README.md"].reject { |f| f.match(/^spec/) && !f.match(/^spec\/fixtures/) }
   s.require_path = 'lib'
   s.requirements << 'none'
 
-  s.add_runtime_dependency 'i18n_data'
-  s.add_runtime_dependency 'rails-i18n'
-  s.add_runtime_dependency 'kaminari-i18n'
-  s.add_runtime_dependency 'spree_core', '>= 4.2.0.rc3'
-  s.add_runtime_dependency 'spree_extension'
+  spree_version = '>= 5.4.0.alpha'
+  s.add_dependency 'spree_core', spree_version
+  s.add_dependency 'spree_extension'
+
+  s.add_dependency 'i18n_data'
+  s.add_dependency 'rails-i18n'
+  s.add_dependency 'kaminari-i18n'
 
   s.add_development_dependency 'spree_dev_tools'
+  s.add_development_dependency 'i18n-tasks'
 end