Пытаюсь задеплоить проект на heroku. Но выдает ошибку RedactorRails

Получаю следующую ошибку /app/app/uploaders/redactor_rails_document_uploader.rb:3:in <class:RedactorRailsDocumentUploader>': uninitialized constant RedactorRails::Backend (NameError)

redactor_rails_picture_uploader.rb

    class RedactorRailsPictureUploader < CarrierWave::Uploader::Base
          include RedactorRails::Backend::CarrierWave
          include CarrierWave::MiniMagick

          storage :file

          def store_dir
              "system/redactor_assets/pictures/#{model.id}"
          end

          process :read_dimensions

          version :thumb do
              process :resize_to_fill => [118, 100]
          end

          version :content do
              process :resize_to_limit => [800, 800]
          end

          def extension_white_list
              RedactorRails.image_file_types
          end

     end

redactor_rails_document_uploader.rb

    class RedactorRailsDocumentUploader < CarrierWave::Uploader::Base
      include RedactorRails::Backend::CarrierWave

      storage :file

      def store_dir
          "system/redactor_assets/documents/#{model.id}"
      end

      def extension_white_list
          RedactorRails.document_file_types
      end
    end