diff --git a/lib/generators/periodicity/install/templates/periodicity.rb.erb b/lib/generators/periodicity/install/templates/periodicity.rb.erb
index b4e493d..05dcca7 100644
--- a/lib/generators/periodicity/install/templates/periodicity.rb.erb
+++ b/lib/generators/periodicity/install/templates/periodicity.rb.erb
@@ -5,5 +5,5 @@
 # Actually you can use any class. The only requirement is that
 # the class should implement a method `perform` without arguments.
 #
-# TestJob.perform_every 2.days, at: "15:30"
+# Periodicity.perform(TestJob).every 2.days, at: "15:30"
 #
diff --git a/lib/periodicity.rb b/lib/periodicity.rb
index dd8e7a9..8311015 100644
--- a/lib/periodicity.rb
+++ b/lib/periodicity.rb
@@ -5,5 +5,3 @@ require "active_support/all"
 require "periodicity/version.rb"
 require "periodicity/period.rb"
 require "periodicity/config.rb"
-require 'periodicity/extensions/active_job'
-require "periodicity/rails.rb" if defined?(::Rails::Engine)
diff --git a/lib/periodicity/extensions/active_job.rb b/lib/periodicity/extensions/active_job.rb
deleted file mode 100644
index fdb9193..0000000
--- a/lib/periodicity/extensions/active_job.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-module Periodicity
-  module Extensions
-    module ActiveJob
-      def perform_every(period, *args)
-        Config.instance.schedule += [self, Period.new(period, *args)]
-      end
-    end
-  end
-end
diff --git a/lib/periodicity/rails.rb b/lib/periodicity/rails.rb
deleted file mode 100644
index 020b8e2..0000000
--- a/lib/periodicity/rails.rb
+++ /dev/null
@@ -1,13 +0,0 @@
-module Periodicity
-  def self.hook_rails!
-    ActiveSupport.on_load(:active_job) do
-      extend Periodicity::Extensions::ActiveJob
-    end
-  end
-
-  class Rails < ::Rails::Engine
-    initializer 'periodicity' do
-      Periodicity.hook_rails!
-    end
-  end
-end
diff --git a/spec/extensions/active_job_spec.rb b/spec/extensions/active_job_spec.rb
deleted file mode 100644
index 44a5127..0000000
--- a/spec/extensions/active_job_spec.rb
+++ /dev/null
@@ -1,16 +0,0 @@
-require "spec_helper"
-
-class TestJob < ActiveJob::Base
-  def perform;end
-end
-
-TestJob.extend(Periodicity::Extensions::ActiveJob)
-
-describe Periodicity::Extensions::ActiveJob do
-  describe "#perform_every" do
-    it "should add job and period to schedule" do
-      TestJob.perform_every(1.second)
-      expect(Periodicity::Config.instance.schedule).to_not be_empty
-    end
-  end
-end