diff --git a/app/controllers/admin/diplomas_controller.rb b/app/controllers/admin/diplomas_controller.rb
index 53466f5..102061c 100644
--- a/app/controllers/admin/diplomas_controller.rb
+++ b/app/controllers/admin/diplomas_controller.rb
@@ -10,7 +10,7 @@ class Admin::DiplomasController < OrbitMemberController
   before_action :allow_admin_only, :only => [:index, :setting]
 
   def index
-    @diplomas = Diploma.order_by(:end_date=>'desc',:start_date=>'desc').page(params[:page]).per(10)
+    @diplomas = Diploma.sort_date.page(params[:page]).per(10)
   end
 
   def new
diff --git a/app/controllers/personal_diplomas_controller.rb b/app/controllers/personal_diplomas_controller.rb
index 7302953..28c6213 100644
--- a/app/controllers/personal_diplomas_controller.rb
+++ b/app/controllers/personal_diplomas_controller.rb
@@ -1,6 +1,6 @@
 class PersonalDiplomasController < ApplicationController
   def index
-    diplomas = Diploma.where(:is_hidden=>false).order_by(:end_date=>'desc', :start_date=>'desc').page(OrbitHelper.params[:page_no]).per(OrbitHelper.page_data_count)
+    diplomas = Diploma.sort_for_frontend.page(OrbitHelper.params[:page_no]).per(OrbitHelper.page_data_count)
     fields_to_show = Page.where(:page_id => params[:page_id]).first.custom_array_field rescue []
     if fields_to_show.blank?
       fields_to_show = [
diff --git a/app/models/diploma.rb b/app/models/diploma.rb
index f7d132e..ce28891 100644
--- a/app/models/diploma.rb
+++ b/app/models/diploma.rb
@@ -25,7 +25,9 @@ class Diploma
 
   before_validation :add_http
 
-  scope :sort_for_frontend, ->{ where(:is_hidden=>false).order_by(:end_date => "desc", :start_date => "desc") }
+  index({end_date: -1, start_date: -1, _id: -1}, { unique: false, background: false })
+  scope :sort_date, ->{ order_by(:end_date => "desc", :start_date => "desc", :id => "desc") }
+  scope :sort_for_frontend, ->{ where(:is_hidden=>false).order_by(:end_date => "desc", :start_date => "desc", :id => "desc") }
 
   def duration
     if !self.start_date.nil? or !self.end_date.nil?
diff --git a/app/views/plugin/personal_diploma/_profile.html.erb b/app/views/plugin/personal_diploma/_profile.html.erb
index 9f92fee..6e18e3a 100644
--- a/app/views/plugin/personal_diploma/_profile.html.erb
+++ b/app/views/plugin/personal_diploma/_profile.html.erb
@@ -7,9 +7,9 @@
 
 <%
   if has_access?
-    @diplomas = Diploma.where(member_profile_id: @member.id).desc(:year).page(params[:page]).per(10)
+    @diplomas = Diploma.where(member_profile_id: @member.id).sort_date.page(params[:page]).per(10)
   else
-    @diplomas = Diploma.where(is_hidden: false, member_profile_id: @member.id).desc(:year).page(params[:page]).per(10)
+    @diplomas = Diploma.where(is_hidden: false, member_profile_id: @member.id).sort_date.page(params[:page]).per(10)
   end
 %>