diff --git a/app/controllers/ad_banners_controller.rb b/app/controllers/ad_banners_controller.rb
index bf11795..313f38d 100644
--- a/app/controllers/ad_banners_controller.rb
+++ b/app/controllers/ad_banners_controller.rb
@@ -21,7 +21,7 @@ class AdBannersController < ApplicationController
     images = []
     adbanner.ad_images.can_display.order_by(is_top: -1, sort_number: 1, created_at: 1).each.with_index do |b,i|
       if b.language_enabled.include?(I18n.locale.to_s)
-        image_link = OrbitHelper.is_mobile_view ? b.file.mobile.url : b.file.url
+        image_link = (OrbitHelper.is_mobile_view ? b.file.mobile.url : b.file.url) + "?v=#{b.updated_at.to_i}"
         klass = i == 0 ? "active" : ""
         caption = i == 0 ? '<div class="cycle-overlay"></div><div class="cycle-pager"></div>' : ""
         banner_title = b.title.to_s
diff --git a/app/views/admin/ad_banners/show.html.erb b/app/views/admin/ad_banners/show.html.erb
index 1b7927d..0267d4d 100644
--- a/app/views/admin/ad_banners/show.html.erb
+++ b/app/views/admin/ad_banners/show.html.erb
@@ -55,13 +55,13 @@
   	  <span class="label label-warning"><%= t(:top) %></span>
       <% end %>
       <% if image.exchange_item == "1" %>
-  			<%= image_tag image.file.thumb, :class => "banner-image" %>
+          <%= image_tag "#{image.file.thumb.url}?v=#{image.updated_at.to_i}", :class => "banner-image" %>
       <% elsif image.exchange_item == "2" %>
         <iframe height="140" src="<%= image.embed_url %>"></iframe>
       <% elsif image.exchange_item == "3" %>
         <%
          video_snapshot_url = ""
-         video_snapshot_url = image.video_snapshot.url if image.video_snapshot.file %>
+         video_snapshot_url = "#{image.video_snapshot.url}?v=#{image.updated_at.to_i}" if image.video_snapshot.file %>
         <video width="320" height="240" controls poster="<%=video_snapshot_url%>">
           <source src="<%= image.video_file.url %>" type="video/mp4">
         Your browser does not support the video tag.
diff --git a/app/views/admin/ad_images/_form.html.erb b/app/views/admin/ad_images/_form.html.erb
index 2383544..3b743b9 100644
--- a/app/views/admin/ad_images/_form.html.erb
+++ b/app/views/admin/ad_images/_form.html.erb
@@ -60,7 +60,7 @@
             <div class="fileupload fileupload-new clearfix <%= 'fileupload-edit' if @ad_image.file.file %>" data-provides="fileupload">
               <div class="fileupload-new thumbnail pull-left">
                 <% if @ad_image.file.file %>
-                  <%= image_tag @ad_image.file.url %>
+                  <%= image_tag "#{@ad_image.file.url}?v=#{@ad_image.updated_at.to_i}" %>
                 <% else %>
                   <img src="https://via.placeholder.com/200x80/EFEFEF/AAAAAA&text=<%= @ad_banner.width %>x<%= @ad_banner.height %>" />
                 <% end %>
@@ -110,7 +110,7 @@
               <a href="#" class="btn fileupload-exists" data-dismiss="fileupload"><%= t(:cancel) %></a>
               <div class="controls" data-toggle="buttons-checkbox">
                 <label class="checkbox inline btn btn-danger fileupload-remove">
-                  <%= f.check_box :remove_file %><%= t(:remove) %>
+                  <%= f.check_box :remove_video_file %><%= t(:remove) %>
                 </label>
               </div>
             </div>
@@ -123,7 +123,7 @@
             <div class="fileupload fileupload-new clearfix <%= 'fileupload-edit' if @ad_image.video_snapshot.file %>" data-provides="fileupload">
               <div class="fileupload-new thumbnail pull-left">
                 <% if @ad_image.video_snapshot.file %>
-                  <%= image_tag @ad_image.video_snapshot.url %>
+                  <%= image_tag "#{@ad_image.video_snapshot.url}?v=#{@ad_image.updated_at.to_i}" %>
                 <% else %>
                   <img src="https://via.placeholder.com/200x80/EFEFEF/AAAAAA&text=<%= @ad_banner.width %>x<%= @ad_banner.height %>" />
                 <% end %>
@@ -137,7 +137,7 @@
               <a href="#" class="btn fileupload-exists" data-dismiss="fileupload"><%= t(:cancel) %></a>
               <div class="controls" data-toggle="buttons-checkbox">
                 <label class="checkbox inline btn btn-danger fileupload-remove">
-                  <%= f.check_box :remove_file %><%= t(:remove) %>
+                  <%= f.check_box :remove_video_snapshot %><%= t(:remove) %>
                 </label>
               </div>
             </div>