diff --git a/db/migrate/20180101160630_change_project_id_for_prometheus_metrics.rb b/db/migrate/20180101160630_change_project_id_for_prometheus_metrics.rb
index 1bdc4e48518..66820f13f54 100644
--- a/db/migrate/20180101160630_change_project_id_for_prometheus_metrics.rb
+++ b/db/migrate/20180101160630_change_project_id_for_prometheus_metrics.rb
@@ -5,8 +5,6 @@ class ChangeProjectIdForPrometheusMetrics < ActiveRecord::Migration
 
   DOWNTIME = false
 
-  disable_ddl_transaction!
-
   def change
     change_column_null :prometheus_metrics, :project_id, true
   end