diff --git a/db/migrate/20200820232017_drop_idx_regular_post_search_data.rb b/db/migrate/20200820232017_drop_idx_regular_post_search_data.rb
index c61920c6a7c..a7e0dfff8c0 100644
--- a/db/migrate/20200820232017_drop_idx_regular_post_search_data.rb
+++ b/db/migrate/20200820232017_drop_idx_regular_post_search_data.rb
@@ -1,4 +1,8 @@
+# frozen_string_literal: true
+
 class DropIdxRegularPostSearchData < ActiveRecord::Migration[6.0]
+  disable_ddl_transaction!
+
   def up
     execute <<~SQL
     DROP INDEX CONCURRENTLY IF EXISTS idx_regular_post_search_data