app/controllers/oauth/authorized_applications_controller.rb

@@ -5,6 +5,7 @@ class Oauth::AuthorizedApplicationsController < Doorkeeper::AuthorizedApplicatio
 
   before_action :store_current_location
   before_action :authenticate_resource_owner!
+  before_action :set_body_classes
 
   include Localized
 
@@ -15,6 +16,10 @@ class Oauth::AuthorizedApplicationsController < Doorkeeper::AuthorizedApplicatio
 
   private
 
+  def set_body_classes
+    @body_classes = 'admin'
+  end
+
   def store_current_location
     store_location_for(:user, request.url)
   end