diff --git a/CHANGELOG.md b/CHANGELOG.md
index 17fdf05..2f43c8d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,13 +2,18 @@
 
 ## Next
 
+## 0.2.2 - 2023-04-26
+
+- [PR#11](https://github.com/tablecheck/paygate-ruby/pull/12) Re-add Rails Engine (was dropped in version 0.2.0) ([johnnyshields](https://github.com/johnnyshields))
+- [PR#12](https://github.com/tablecheck/paygate-ruby/pull/12) Rename Paygate::ActionView::FormHelper to Paygate::Rails::FormHelper. ([johnnyshields](https://github.com/johnnyshields))
+
 ## 0.2.1 - 2023-04-26
 
 - [PR#11](https://github.com/tablecheck/paygate-ruby/pull/11) Deep freeze constants. ([johnnyshields](https://github.com/johnnyshields))
 
 ## 0.2.0 - 2023-04-26
 
-- [PR#9](https://github.com/tablecheck/paygate-ruby/pull/9) Rename Paygate::FormHelper to Paygate::Rails::FormHelper. ([johnnyshields](https://github.com/johnnyshields))
+- [PR#9](https://github.com/tablecheck/paygate-ruby/pull/9) Rename Paygate::FormHelper to Paygate::ActionView::FormHelper. ([johnnyshields](https://github.com/johnnyshields))
 - [PR#9](https://github.com/tablecheck/paygate-ruby/pull/9) Do not include Paygate::FormHelper in ActionView::Base. ([johnnyshields](https://github.com/johnnyshields))
 - [PR#9](https://github.com/tablecheck/paygate-ruby/pull/9) Update BIN list. Note BINs can now be a flexible number of digits. ([johnnyshields](https://github.com/johnnyshields))
 - [PR#9](https://github.com/tablecheck/paygate-ruby/pull/9) Rename data config YAML keys. ([johnnyshields](https://github.com/johnnyshields))
diff --git a/lib/paygate.rb b/lib/paygate.rb
index 410b191..76667ff 100644
--- a/lib/paygate.rb
+++ b/lib/paygate.rb
@@ -9,19 +9,20 @@
 require 'paygate/response'
 require 'paygate/transaction'
 require 'paygate/profile'
-require 'paygate/action_view/form_helper' if defined?(ActionView)
+
+if defined?(Rails)
+  require 'paygate/rails/engine'
+  require 'paygate/rails/form_helper'
+end
 
 module Paygate
   extend self
 
   CONFIG = YAML.safe_load(File.read(File.expand_path('../data/config.yml', __dir__)),
                           permitted_classes: [Symbol]).freeze
-  LOCALES_MAP = CONFIG[:locales].freeze
-  LOCALES_MAP.each { |k, v| k.freeze; v.freeze } # rubocop:disable Style/Semicolon
-  INTL_BRANDS_MAP = CONFIG[:intl_brands].freeze
-  INTL_BRANDS_MAP.each_value(&:freeze)
-  KOREA_BIN_NUMBERS = CONFIG[:korea_bin_numbers].freeze
-  KOREA_BIN_NUMBERS.each(&:freeze)
+  (LOCALES_MAP = CONFIG[:locales].freeze).each { |k, v| k.freeze; v.freeze } # rubocop:disable Style/Semicolon
+  (INTL_BRANDS_MAP = CONFIG[:intl_brands].freeze).each_value(&:freeze)
+  (KOREA_BIN_NUMBERS = CONFIG[:korea_bin_numbers].freeze).each(&:freeze)
   DEFAULT_CURRENCY = 'WON'
   DEFAULT_LOCALE = 'US'
 
diff --git a/lib/paygate/rails/engine.rb b/lib/paygate/rails/engine.rb
new file mode 100644
index 0000000..08d7769
--- /dev/null
+++ b/lib/paygate/rails/engine.rb
@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+module Paygate
+  module Rails
+    class Engine < ::Rails::Engine
+    end
+  end
+end
diff --git a/lib/paygate/action_view/form_helper.rb b/lib/paygate/rails/form_helper.rb
similarity index 96%
rename from lib/paygate/action_view/form_helper.rb
rename to lib/paygate/rails/form_helper.rb
index 5e52081..3b31afe 100644
--- a/lib/paygate/action_view/form_helper.rb
+++ b/lib/paygate/rails/form_helper.rb
@@ -1,9 +1,9 @@
 # frozen_string_literal: true
 
 module Paygate
-  module ActionView
+  module Rails
     module FormHelper
-      PAYGATE_FORM_TEXT_FIELDS = {
+      (PAYGATE_FORM_TEXT_FIELDS = {
         mid: {
           placeholder: 'Member ID'
         },
@@ -117,13 +117,13 @@ module FormHelper
 
         profile_no: {
           placeholder: 'Profile No'
-        },
+        }.freeze,
 
         hash_result: {
           name: 'hashresult',
           placeholder: 'Hash Result'
         }
-      }.freeze
+      }.freeze).each_value(&:freeze)
 
       def paygate_open_pay_api_js_url
         if Paygate.configuration.mode == :live
diff --git a/lib/paygate/version.rb b/lib/paygate/version.rb
index 763e48c..7959a94 100644
--- a/lib/paygate/version.rb
+++ b/lib/paygate/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Paygate
-  VERSION = '0.2.1'
+  VERSION = '0.2.2'
 end