diff --git a/.envrc b/.envrc
new file mode 100644
index 00000000..57d59c52
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+export PATH=./bin:$PATH
diff --git a/CHANGELOG.md b/CHANGELOG.md
index aa3a99a1..fd3dfad0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,15 @@
-# Not Released
+# Change Log
+All notable changes to this project will be documented in this file.
+This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [Unreleased]
+### Changed
+- Tenancy is enabled from the get go. Assigning a tenant is optional. See "Previous Versions" in the README on upgrading.
+- Required jquery-ui version
+- How migrations are done, which may be a breaking change from older versions of Plutus
+
+### Fixed
 - Fix loading of jquery-ui files (Fixes https://github.com/mbulat/plutus/issues/58)
+
+### Added
 - Add `Account#amounts` and `Account#entries` to get all amounts and entries, respectively
diff --git a/README.markdown b/README.markdown
index 5b57cae5..5d952655 100644
--- a/README.markdown
+++ b/README.markdown
@@ -16,9 +16,7 @@ Installation
 ============
 
 - Add the gem to your Gemfile `gem "plutus"`
-
-- generate migration files `rails g plutus`
-
+- generate migration files `rake plutus:install:migrations`
 - run migrations `rake db:migrate`
 
 Overview
@@ -269,41 +267,11 @@ entry = Plutus::Entry.build(
 Multitenancy Support
 =====================
 
-Plutus supports multitenant applications. Multitenancy is acheived by associating all Accounts under `Plutus::Account` with a "Tenant" object (typically some model in your Rails application). To add multi-tenancy support to Plutus, you must do the following:
-
-- Generate the migration which will add `tenant_id` to the plutus accounts table
-
-```sh
-bundle exec rails g plutus:tenancy
-```
-
-- Run the migration
-
-```sh
-rake db:migrate
-```
+Each account may belong to a polymorphic `tenant`. In previous versions plutus, the tenant code and tenant column had to be explicitly included by the developer. This complicated future changes (migrations, code testing) though and has since changed.
 
-- Add an initializer to your Rails application, i.e. `config/initializers/plutus.rb`
-
-```ruby
-Plutus.config do |config|
-  config.enable_tenancy = true
-  config.tenant_class = 'Tenant'
-end
-```
-*NOTE: When building entries, be sure to specify the account directly, rather than use the `account_name` feature. Otherwise you'll probably end up with the wrong account.*
+In current versions of plutus, the accounts table have `tenant_id` and `tenant_type`. If you do not need accounts to belong to tenants, then you need not set these. The data storage overhead for empty columns with relational databases is negligible.
 
-```ruby
-debit_account = Plutus::Account.where(:name => "Cash", :tenant => my_tenant).last
-credit_account = Plutus::Account.where(:name => "Unearned Revenue", :tenant => my_tenant).last
-entry = Plutus::Entry.new(
-                :description => "Order placed for widgets",
-                :date => Date.yesterday,
-                :debits => [
-                  {:account => debit_account, :amount => 100.00}],
-                :credits => [
-                  {:account => credit_account, :amount => 100.00}])
-```
+See "Previous Versions" on how to upgrade.
 
 Reporting Views
 ===============
@@ -326,6 +294,11 @@ mount Plutus::Engine => "/plutus", :as => "plutus"
 Previous Versions
 =================
 
+If you're upgrading from older versions prior to the tenancy changes, you need to:
+
+1. `rake plutus:install:migrations`
+2. `rake db:migrate`
+
 For the rails 3 version, you can go here:
 
 [https://github.com/mbulat/plutus/tree/rails3](https://github.com/mbulat/plutus/tree/rails3)
diff --git a/app/models/plutus/account.rb b/app/models/plutus/account.rb
index c26ee54e..93c0c682 100644
--- a/app/models/plutus/account.rb
+++ b/app/models/plutus/account.rb
@@ -41,11 +41,8 @@ class Account < ActiveRecord::Base
 
     validates_presence_of :type
 
-    if Plutus.enable_tenancy
-      include Plutus::Tenancy
-    else
-      include Plutus::NoTenancy
-    end
+    validates :name, presence: true, uniqueness: { scope: [:tenant_id, :tenant_type] }
+    belongs_to :tenant, polymorphic: true
 
     # The balance of the account. This instance method is intended for use only
     # on instances of account subclasses.
diff --git a/app/models/plutus/no_tenancy.rb b/app/models/plutus/no_tenancy.rb
deleted file mode 100644
index b6729966..00000000
--- a/app/models/plutus/no_tenancy.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-module Plutus
-  module NoTenancy
-    extend ActiveSupport::Concern
-
-    included do
-      validates :name, presence: true, uniqueness: true
-    end
-  end
-end
diff --git a/app/models/plutus/tenancy.rb b/app/models/plutus/tenancy.rb
deleted file mode 100644
index cb6e2a0e..00000000
--- a/app/models/plutus/tenancy.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-module Plutus
-  module Tenancy
-    extend ActiveSupport::Concern
-
-    included do
-      validates :name, presence: true, uniqueness: { scope: :tenant_id }
-
-      if ActiveRecord::VERSION::MAJOR > 4
-        belongs_to :tenant, class_name: Plutus.tenant_class, optional: true
-      else
-        belongs_to :tenant, class_name: Plutus.tenant_class
-      end
-    end
-  end
-end
diff --git a/bin/rails b/bin/rails
new file mode 100755
index 00000000..80910fc4
--- /dev/null
+++ b/bin/rails
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# This command will automatically be run when you run "rails" with Rails 4 gems installed from the root of your application.
+
+ENGINE_ROOT = File.expand_path('../..', __FILE__)
+ENGINE_PATH = File.expand_path('../../lib/plutus/engine', __FILE__)
+
+# Set up gems listed in the Gemfile.
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile', __FILE__)
+require 'bundler/setup' if File.exist?(ENV['BUNDLE_GEMFILE'])
+
+require 'rails/all'
+require 'rails/engine/commands'
diff --git a/lib/generators/plutus/templates/migration.rb b/db/migrate/20160422010135_create_plutus_tables.rb
similarity index 87%
rename from lib/generators/plutus/templates/migration.rb
rename to db/migrate/20160422010135_create_plutus_tables.rb
index 1879a3ab..7be31ff6 100644
--- a/lib/generators/plutus/templates/migration.rb
+++ b/db/migrate/20160422010135_create_plutus_tables.rb
@@ -1,5 +1,5 @@
 class CreatePlutusTables < ActiveRecord::Migration[4.2]
-  def self.up
+  def change
     create_table :plutus_accounts do |t|
       t.string :name
       t.string :type
@@ -30,10 +30,4 @@ def self.up
     add_index :plutus_amounts, [:account_id, :entry_id]
     add_index :plutus_amounts, [:entry_id, :account_id]
   end
-
-  def self.down
-    drop_table :plutus_accounts
-    drop_table :plutus_entries
-    drop_table :plutus_amounts
-  end
 end
diff --git a/db/migrate/20160422034059_add_tenant_id_and_tenant_type_to_accounts.rb b/db/migrate/20160422034059_add_tenant_id_and_tenant_type_to_accounts.rb
new file mode 100644
index 00000000..e7ee3df5
--- /dev/null
+++ b/db/migrate/20160422034059_add_tenant_id_and_tenant_type_to_accounts.rb
@@ -0,0 +1,21 @@
+class AddTenantIdAndTenantTypeToAccounts < ActiveRecord::Migration
+  def up
+    unless Plutus.enable_tenancy
+      add_column :plutus_accounts, :tenant_id, :integer
+    end
+
+    add_column :plutus_accounts, :tenant_type, :string
+
+    Plutus::Account.reset_column_information
+    Plutus::Account.update_all(tenant_type: Plutus.tenant_class)
+
+    add_index :plutus_accounts, [:tenant_id, :tenant_type]
+  end
+
+  def down
+    unless Plutus.enable_tenancy
+      remove_column :plutus_accounts, :tenant_id, :integer
+    end
+    remove_column :plutus_accounts, :tenant_type, :string
+  end
+end
diff --git a/fixture_rails_root/Gemfile.lock b/fixture_rails_root/Gemfile.lock
index 6804b59d..ac646f1c 100644
--- a/fixture_rails_root/Gemfile.lock
+++ b/fixture_rails_root/Gemfile.lock
@@ -195,4 +195,8 @@ DEPENDENCIES
   web-console (>= 3.3.0)
 
 BUNDLED WITH
+<<<<<<< HEAD
    1.15.1
+=======
+   1.11.2
+>>>>>>> 14e61c8... Always support tenancy
diff --git a/fixture_rails_root/db/migrate/20160422044435_add_tenant_id_and_tenant_type_to_accounts.plutus.rb b/fixture_rails_root/db/migrate/20160422044435_add_tenant_id_and_tenant_type_to_accounts.plutus.rb
new file mode 100644
index 00000000..5515eda9
--- /dev/null
+++ b/fixture_rails_root/db/migrate/20160422044435_add_tenant_id_and_tenant_type_to_accounts.plutus.rb
@@ -0,0 +1,22 @@
+# This migration comes from plutus (originally 20160422034059)
+class AddTenantIdAndTenantTypeToAccounts < ActiveRecord::Migration
+  def up
+    unless Plutus.enable_tenancy
+      add_column :plutus_accounts, :tenant_id, :integer
+    end
+
+    add_column :plutus_accounts, :tenant_type, :string
+
+    Plutus::Account.reset_column_information
+    Plutus::Account.update_all(tenant_type: Plutus.tenant_class)
+
+    add_index :plutus_accounts, [:tenant_id, :tenant_type]
+  end
+
+  def down
+    unless Plutus.enable_tenancy
+      remove_column :plutus_accounts, :tenant_id, :integer
+    end
+    remove_column :plutus_accounts, :tenant_type, :string
+  end
+end
diff --git a/fixture_rails_root/db/migrate/20170710173916_create_plutus_tables.rb b/fixture_rails_root/db/migrate/20170710173916_create_plutus_tables.rb
index 7851eee3..65f09755 100644
--- a/fixture_rails_root/db/migrate/20170710173916_create_plutus_tables.rb
+++ b/fixture_rails_root/db/migrate/20170710173916_create_plutus_tables.rb
@@ -1,5 +1,5 @@
 class CreatePlutusTables < ActiveRecord::Migration[4.2]
-  def self.up
+  def change
     create_table :plutus_accounts do |t|
       t.string :name
       t.string :type
@@ -30,10 +30,4 @@ def self.up
     add_index :plutus_amounts, [:account_id, :entry_id]
     add_index :plutus_amounts, [:entry_id, :account_id]
   end
-
-  def self.down
-    drop_table :plutus_accounts
-    drop_table :plutus_entries
-    drop_table :plutus_amounts
-  end
 end
diff --git a/fixture_rails_root/db/schema.rb b/fixture_rails_root/db/schema.rb
index 67d7b6fa..20f24552 100644
--- a/fixture_rails_root/db/schema.rb
+++ b/fixture_rails_root/db/schema.rb
@@ -18,8 +18,10 @@
     t.boolean "contra"
     t.datetime "created_at"
     t.datetime "updated_at"
-    t.integer "tenant_id"
+    t.integer  "tenant_id"
+    t.string   "tenant_type"
     t.index ["name", "type"], name: "index_plutus_accounts_on_name_and_type"
+    t.index ["tenant_id", "tenant_type"], name: "index_plutus_accounts_on_tenant_name_and_tenant_type"
   end
 
   create_table "plutus_amounts", force: :cascade do |t|
diff --git a/lib/generators/plutus/templates/add_date_migration.rb b/lib/generators/plutus/templates/add_date_migration.rb
deleted file mode 100644
index 2ba4c6ea..00000000
--- a/lib/generators/plutus/templates/add_date_migration.rb
+++ /dev/null
@@ -1,6 +0,0 @@
-class AddDateToPlutusEntries < ActiveRecord::Migration[4.2]
-  def change
-    add_column :plutus_entries, :date, :date
-    add_index :plutus_entries, :date
-  end
-end
diff --git a/lib/generators/plutus/templates/tenant_migration.rb b/lib/generators/plutus/templates/tenant_migration.rb
deleted file mode 100644
index ca1cba7d..00000000
--- a/lib/generators/plutus/templates/tenant_migration.rb
+++ /dev/null
@@ -1,6 +0,0 @@
-class TenantPlutusTables < ActiveRecord::Migration[4.2]
-  def change
-    # add a tenant column to plutus accounts table.
-    add_column :plutus_accounts, :tenant_id, :integer, index: true
-  end
-end
diff --git a/lib/generators/plutus/templates/update_migration.rb b/lib/generators/plutus/templates/update_migration.rb
deleted file mode 100644
index 1d86451d..00000000
--- a/lib/generators/plutus/templates/update_migration.rb
+++ /dev/null
@@ -1,17 +0,0 @@
-class UpdatePlutusTables < ActiveRecord::Migration[4.2]
-  def change
-    # we have to remove these indexes because the temporary
-    # table index name is too long
-    remove_index :plutus_amounts, [:account_id, :transaction_id]
-    remove_index :plutus_amounts, [:transaction_id, :account_id]
-    remove_index :plutus_transactions, column: [:commercial_document_id, :commercial_document_type], :name => "index_transactions_on_commercial_doc"
-
-    rename_table :plutus_transactions, :plutus_entries
-    rename_column :plutus_amounts, :transaction_id, :entry_id
-
-    # adding the indexes back
-    add_index :plutus_amounts, [:account_id, :entry_id]
-    add_index :plutus_amounts, [:entry_id, :account_id]
-    add_index :plutus_entries, [:commercial_document_id, :commercial_document_type], :name => "index_entries_on_commercial_doc"
-  end
-end
diff --git a/lib/plutus.rb b/lib/plutus.rb
index ec12afd9..476d84d6 100644
--- a/lib/plutus.rb
+++ b/lib/plutus.rb
@@ -2,11 +2,6 @@
 require "rails"
 
 module Plutus
-  class Engine < Rails::Engine
-    isolate_namespace Plutus
-  end
-
-
   # ------------------------------ tenancy ------------------------------
   # configuration to enable or disable tenancy
   mattr_accessor :enable_tenancy
@@ -21,3 +16,5 @@ def self.config
     yield(self)
   end
 end
+
+require "plutus/engine"
diff --git a/lib/plutus/engine.rb b/lib/plutus/engine.rb
new file mode 100644
index 00000000..2ff36c2b
--- /dev/null
+++ b/lib/plutus/engine.rb
@@ -0,0 +1,5 @@
+module Plutus
+  class Engine < Rails::Engine
+    isolate_namespace Plutus
+  end
+end