diff --git a/db/migrate/20230529210259_add_raid_groups_table.rb b/db/migrate/20230529210259_add_raid_groups_table.rb
index 593b5db..7803d82 100644
--- a/db/migrate/20230529210259_add_raid_groups_table.rb
+++ b/db/migrate/20230529210259_add_raid_groups_table.rb
@@ -1,10 +1,16 @@
 class AddRaidGroupsTable < ActiveRecord::Migration[7.0]
-  create_table :raid_groups, id: :uuid, default: -> { "gen_random_uuid()" } do |t|
-    t.string :name_en, null: false
-    t.string :name_jp, null: false
-    t.integer :difficulty
-    t.integer :order, null: false
-    t.integer :section, default: 1, null: false
-    t.boolean :extra, default: false, null: false
+  def up
+    create_table :raid_groups, id: :uuid, default: -> { "gen_random_uuid()" } do |t|
+      t.string :name_en, null: false
+      t.string :name_jp, null: false
+      t.integer :difficulty
+      t.integer :order, null: false
+      t.integer :section, default: 1, null: false
+      t.boolean :extra, default: false, null: false
+    end
+  end
+
+  def down
+    drop_table :raid_groups
   end
 end