diff --git a/apps/myjobs/db/migrate/20160601203013_add_timestamps_to_to_json_stores.rb b/apps/myjobs/db/migrate/20160601203013_add_timestamps_to_to_json_stores.rb
index a38f0fcc6e..96e05b9d52 100644
--- a/apps/myjobs/db/migrate/20160601203013_add_timestamps_to_to_json_stores.rb
+++ b/apps/myjobs/db/migrate/20160601203013_add_timestamps_to_to_json_stores.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddTimestampsToToJsonStores < ActiveRecord::Migration[4.2]
   def change
     add_column :json_stores, :created_at, :datetime