diff --git a/Gemfile.lock b/Gemfile.lock
index df0fce7..56a8f0a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    enumerate_it (1.5.0)
+    enumerate_it (1.6.0)
       activesupport (>= 3.0.0)
 
 GEM
@@ -80,4 +80,4 @@ DEPENDENCIES
   wwtd
 
 BUNDLED WITH
-   1.15.3
+   1.15.4
diff --git a/README.md b/README.md
index da24a9d..5b7ff3d 100644
--- a/README.md
+++ b/README.md
@@ -47,13 +47,7 @@ Add the gem to your Gemfile:
 gem 'enumerate_it'
 ```
 
-Run the install generator:
-
-```bash
-rails generate enumerate_it:install
-```
-
-There is also a Rails Generator which generates enumerations and their locale files:
+You can use a Rails generator, which generates enumerations and their locale files:
 
 ```bash
 rails generate enumerate_it:enum --help
@@ -183,10 +177,17 @@ The `sort_by` method accepts one of the following values:
 
 ## Using enumerations
 
-The cool part is that you can use these enumerations with any class, be it an `ActiveRecord`
-instance or not.
+The cool part is that you can use these enumerations with any class:
+
+```ruby
+# ActiveRecord instance
+class Person < ApplicationRecord
+  has_enumeration_for :relationship_status
+end
+```
 
 ```ruby
+# Non-ActiveRecord instance
 class Person
   extend EnumerateIt
   attr_accessor :relationship_status
@@ -231,7 +232,7 @@ This will create:
 * A helper method for each enumeration option, if you pass the `create_helpers` option as `true`:
 
   ```ruby
-  class Person < ActiveRecord::Base
+  class Person < ApplicationRecord
     has_enumeration_for :relationship_status, with: RelationshipStatus, create_helpers: true
   end
 
@@ -249,7 +250,7 @@ This will create:
   option. This can be useful when two or more of the enumerations used share the same constants:
 
   ```ruby
-  class Person < ActiveRecord::Base
+  class Person < ApplicationRecord
     has_enumeration_for :relationship_status,
       with: RelationshipStatus, create_helpers: { prefix: true }
   end
@@ -279,12 +280,12 @@ This will create:
 
     class Single
       def saturday_night
-        'Party Hard!'
+        'Party hard!'
       end
     end
   end
 
-  class Person < ActiveRecord::Base
+  class Person < ApplicationRecord
     has_enumeration_for :relationship_status,
       with: RelationshipStatus, create_helpers: { polymorphic: true }
   end
@@ -296,13 +297,13 @@ This will create:
 
   p.relationship_status = RelationshipStatus::SINGLE
   p.relationship_status_object.saturday_night
-  #=> 'Party Hard!'
+  #=> 'Party hard!'
   ```
 
   You can also change the suffix `_object`, using the `suffix` option:
 
   ```ruby
-  class Person < ActiveRecord::Base
+  class Person < ApplicationRecord
     has_enumeration_for :relationship_status,
       with: RelationshipStatus, create_helpers: { polymorphic: { suffix: '_mode' } }
   end
@@ -324,7 +325,7 @@ This will create:
 * A scope method for each enumeration option if you pass the `create_scopes` option as `true`:
 
   ```ruby
-  class Person < ActiveRecord::Base
+  class Person < ApplicationRecord
     has_enumeration_for :relationship_status, with: RelationshipStatus, create_scopes: true
   end
 
@@ -335,7 +336,7 @@ This will create:
   The `:create_scopes` also accepts `prefix` option.
 
   ```ruby
-  class Person < ActiveRecord::Base
+  class Person < ApplicationRecord
     has_enumeration_for :relationship_status,
       with: RelationshipStatus, create_scopes: { prefix: true }
   end
@@ -347,7 +348,7 @@ This will create:
   `validates_inclusion_of`):
 
   ```ruby
-  class Person < ActiveRecord::Base
+  class Person < ApplicationRecord
     has_enumeration_for :relationship_status, with: RelationshipStatus
   end
 
@@ -362,7 +363,7 @@ This will create:
   `validates_presence_of` and you pass the `required` options as `true`):
 
   ```ruby
-  class Person < ActiveRecord::Base
+  class Person < ApplicationRecord
     has_enumeration_for :relationship_status, required: true
   end
 
@@ -376,7 +377,7 @@ This will create:
   If you pass the `skip_validation` option as `true`, it will not create any validations:
 
   ```ruby
-  class Person < ActiveRecord::Base
+  class Person < ApplicationRecord
     has_enumeration_for :relationship_status, with: RelationshipStatus, skip_validation: true
   end
 
@@ -385,8 +386,7 @@ This will create:
   #=> true
   ```
 
-Remember that you can add validations to any kind of class and not only to those derived from
-`ActiveRecord::Base`.
+Remember that you can add validations to any kind of class and not only `ActiveRecord` ones.
 
 ## FAQ
 
diff --git a/lib/enumerate_it.rb b/lib/enumerate_it.rb
index 44677ac..703ea85 100644
--- a/lib/enumerate_it.rb
+++ b/lib/enumerate_it.rb
@@ -11,3 +11,5 @@ def self.extended(receiver)
     receiver.extend ClassMethods
   end
 end
+
+ActiveSupport.on_load(:active_record) { ActiveRecord::Base.extend EnumerateIt }
diff --git a/lib/enumerate_it/version.rb b/lib/enumerate_it/version.rb
index 1b29fc7..1b8408f 100644
--- a/lib/enumerate_it/version.rb
+++ b/lib/enumerate_it/version.rb
@@ -1,3 +1,3 @@
 module EnumerateIt
-  VERSION = '1.5.0'.freeze
+  VERSION = '1.6.0'.freeze
 end
diff --git a/lib/generators/enumerate_it/install/USAGE b/lib/generators/enumerate_it/install/USAGE
deleted file mode 100644
index 54039a6..0000000
--- a/lib/generators/enumerate_it/install/USAGE
+++ /dev/null
@@ -1,8 +0,0 @@
-Description:
-    Creates an initializer file for EnumerateIt
-
-Example:
-    rails generate enumerate_it:install
-
-    This will create:
-        config/initializers/enumerate_it.rb
diff --git a/lib/generators/enumerate_it/install/install_generator.rb b/lib/generators/enumerate_it/install/install_generator.rb
deleted file mode 100644
index e01126f..0000000
--- a/lib/generators/enumerate_it/install/install_generator.rb
+++ /dev/null
@@ -1,11 +0,0 @@
-module EnumerateIt
-  module Generators
-    class InstallGenerator < Rails::Generators::Base
-      source_root File.expand_path('../templates', __FILE__)
-
-      def copy_initializer_file
-        template 'enumerate_it_initializer.rb', File.join('config/initializers/', 'enumerate_it.rb')
-      end
-    end
-  end
-end
diff --git a/lib/generators/enumerate_it/install/templates/enumerate_it_initializer.rb b/lib/generators/enumerate_it/install/templates/enumerate_it_initializer.rb
deleted file mode 100644
index a7befac..0000000
--- a/lib/generators/enumerate_it/install/templates/enumerate_it_initializer.rb
+++ /dev/null
@@ -1 +0,0 @@
-ActiveRecord::Base.extend EnumerateIt
diff --git a/spec/enumerate_it_spec.rb b/spec/enumerate_it_spec.rb
index 20060a8..5394f27 100644
--- a/spec/enumerate_it_spec.rb
+++ b/spec/enumerate_it_spec.rb
@@ -254,7 +254,6 @@ class Polymorphic
         Object.send :remove_const, 'TestClassWithScope' if defined?(TestClassWithScope)
 
         class TestClassWithScope < ActiveRecord::Base
-          extend EnumerateIt
           has_enumeration_for :foobar, with: TestEnumeration, create_scopes: true
         end
       end
@@ -290,7 +289,6 @@ class GenericClass
     context 'with :prefix option' do
       before do
         class OtherTestClass < ActiveRecord::Base
-          extend EnumerateIt
           has_enumeration_for :foobar, with: TestEnumerationWithReservedWords,
             create_scopes: { prefix: true }
         end