diff -Nuar redmine-3.4.3-orig/app/controllers/application_controller.rb redmine-3.4.3/app/controllers/application_controller.rb
--- redmine-3.4.3-orig/app/controllers/application_controller.rb	2017-12-11 20:55:04.942299001 +0500
+++ redmine-3.4.3/app/controllers/application_controller.rb	2017-12-11 20:55:17.285298402 +0500
@@ -15,6 +15,7 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
+require 'request_store'
 require 'uri'
 require 'cgi'
 
diff -Nuar redmine-3.4.3-orig/app/controllers/welcome_controller.rb redmine-3.4.3/app/controllers/welcome_controller.rb
--- redmine-3.4.3-orig/app/controllers/welcome_controller.rb	2017-12-11 20:55:04.942299001 +0500
+++ redmine-3.4.3/app/controllers/welcome_controller.rb	2017-12-11 20:55:17.286298402 +0500
@@ -15,6 +15,9 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
+require 'action_controller'
+require 'action_controller/action_caching'
+
 class WelcomeController < ApplicationController
   self.main_menu = false
 
diff -Nuar redmine-3.4.3-orig/app/models/custom_field.rb redmine-3.4.3/app/models/custom_field.rb
--- redmine-3.4.3-orig/app/models/custom_field.rb	2017-12-11 20:55:04.926299002 +0500
+++ redmine-3.4.3/app/models/custom_field.rb	2017-12-11 20:55:17.286298402 +0500
@@ -15,6 +15,8 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
+require 'protected_attributes'
+
 class CustomField < ActiveRecord::Base
   include Redmine::SafeAttributes
   include Redmine::SubclassFactory
diff -Nuar redmine-3.4.3-orig/app/models/mailer.rb redmine-3.4.3/app/models/mailer.rb
--- redmine-3.4.3-orig/app/models/mailer.rb	2017-12-11 20:55:04.926299002 +0500
+++ redmine-3.4.3/app/models/mailer.rb	2017-12-11 20:55:17.286298402 +0500
@@ -16,6 +16,7 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 require 'roadie'
+require 'roadie-rails'
 
 class Mailer < ActionMailer::Base
   layout 'mailer'
diff -Nuar redmine-3.4.3-orig/bin/rails redmine-3.4.3/bin/rails
--- redmine-3.4.3-orig/bin/rails	2017-12-11 20:55:04.986298999 +0500
+++ redmine-3.4.3/bin/rails	2017-12-11 20:58:40.247288555 +0500
@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
 APP_PATH = File.expand_path('../../config/application',  __FILE__)
 require_relative '../config/boot'
+
+gem 'rails', '~> 4.2'
 require 'rails/commands'
diff -Nuar redmine-3.4.3-orig/config/application.rb redmine-3.4.3/config/application.rb
--- redmine-3.4.3-orig/config/application.rb	2017-12-11 20:55:04.971298999 +0500
+++ redmine-3.4.3/config/application.rb	2017-12-11 20:58:20.477289514 +0500
@@ -1,8 +1,11 @@
 require File.expand_path('../boot', __FILE__)
 
+gem 'rails', '~> 4.2'
+gem 'actionpack-xml_parser', '~> 1.0'
+
 require 'rails/all'
+require 'action_dispatch/xml_params_parser'
 
-Bundler.require(*Rails.groups)
 
 module RedmineApp
   class Application < Rails::Application