diff --git a/lib/migrate/001_create_musics.rb b/lib/migrate/001_create_musics.rb
index 10aa16eb8e4804b91de3aa11414ab44d9abc6257..1e7869969cee3a2855757940a27bbd40236f14c1 100644
--- a/lib/migrate/001_create_musics.rb
+++ b/lib/migrate/001_create_musics.rb
@@ -9,6 +9,7 @@ class CreateMusics < ActiveRecord::Migration
             t.string :sender, :null => false
             t.string :url, :null => false
             t.string :file
+            t.timestamps
         end
 
         add_index :musics, :url, :unique