diff --git a/app/models/archive_file.rb b/app/models/archive_file.rb
index 5daba82..9d30e3c 100644
--- a/app/models/archive_file.rb
+++ b/app/models/archive_file.rb
@@ -349,7 +349,7 @@ class ArchiveFile
     return [data, serial_number, idx]
   end
   def get_frontend_data(locale=nil, serial_number=0, idx=0, show_tags=false, more_url=nil)
-    created_at_int = self.created_at.strftime('%Y%m%d').to_i
+    updated_at_int = self.updated_at.strftime('%Y%m%d').to_i
     statuses = self.statuses_with_classname.collect do |status|
       {
         "status" => status["name"] || "",
@@ -361,7 +361,7 @@ class ArchiveFile
       "archive-file-url" => (files.count != 0 ? files[0]["file-url"] : "javascript:void"),
       "archive-title" => self.title,
       "description" => self.description,
-      "created_at" => created_at_int,
+      "created_at" => updated_at_int,
       "archive-url" => self.url,
       "url" => self.url,
       "statuses" => statuses,