diff --git a/app/controllers/guests_controller.rb b/app/controllers/guests_controller.rb
index 925770f..aa23e4b 100644
--- a/app/controllers/guests_controller.rb
+++ b/app/controllers/guests_controller.rb
@@ -7,7 +7,7 @@ class GuestsController < ApplicationController
   def index
     @guests = Guest.all
                    .joins(:group)
-                   .order('groups.name' => :asc)
+                   .order('groups.name' => :asc, first_name: :asc, last_name: :asc)
 
       render jsonapi: @guests
   end