diff --git a/app/controllers/announcement_controller.rb b/app/controllers/announcement_controller.rb
index 93083c1e..ee2bbb24 100644
--- a/app/controllers/announcement_controller.rb
+++ b/app/controllers/announcement_controller.rb
@@ -1,4 +1,6 @@
 class AnnouncementController < ApplicationController
+  before_action :authenticate_user!
+
   def index
     @announcements = Announcement.all
   end
diff --git a/config/routes.rb b/config/routes.rb
index bdc9a8c7..56dfd2b4 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -127,12 +127,15 @@ Rails.application.routes.draw do
   match '/:username/groups(/p/:page)', to: 'user#groups', via: 'get', as: :show_user_groups, defaults: {page: 1}
   match '/:username/questions(/p/:page)', to: 'user#questions', via: 'get', as: :show_user_questions, defaults: {page: 1}
 
-  match "/admin/announcements", to: "announcement#index", via: :get, as: :announcement_index
-  match "/admin/announcements", to: "announcement#create", via: :post, as: :announcement_create
-  match "/admin/announcements/new", to: "announcement#new", via: :get, as: :announcement_new
-  match "/admin/announcements/:id/edit", to: "announcement#edit", via: :get, as: :announcement_edit
-  match "/admin/announcements/:id", to: "announcement#update", via: :patch, as: :announcement_update
-  match "/admin/announcements/:id", to: "announcement#destroy", via: :delete, as: :announcement_destroy
+  constraints ->(req) { req.env['warden'].authenticate?(scope: :user) &&
+    (req.env['warden'].user.admin?) } do
+    match "/admin/announcements", to: "announcement#index", via: :get, as: :announcement_index
+    match "/admin/announcements", to: "announcement#create", via: :post, as: :announcement_create
+    match "/admin/announcements/new", to: "announcement#new", via: :get, as: :announcement_new
+    match "/admin/announcements/:id/edit", to: "announcement#edit", via: :get, as: :announcement_edit
+    match "/admin/announcements/:id", to: "announcement#update", via: :patch, as: :announcement_update
+    match "/admin/announcements/:id", to: "announcement#destroy", via: :delete, as: :announcement_destroy
+  end
 
   puts 'processing time of routes.rb: ' + "#{(Time.now - start).round(3).to_s.ljust(5, '0')}s".light_green
 end