diff --git a/db/migrate/20220128044651_remove_annomark_id_in_annotations.rb b/db/migrate/20220128044651_remove_annomark_id_in_annotations.rb
index 69f2a50..1521c38 100644
--- a/db/migrate/20220128044651_remove_annomark_id_in_annotations.rb
+++ b/db/migrate/20220128044651_remove_annomark_id_in_annotations.rb
@@ -1,5 +1,9 @@
 class RemoveAnnomarkIdInAnnotations < ActiveRecord::Migration[6.1]
-  def change
-    safety_assured { remove_column :annotations, :annomark_id, :integer, null: false }
+  def up
+    safety_assured { remove_column :annotations, :annomark_id, :integer }
+  end
+
+  def down
+    add_column :annotations, :annomark_id, :integer, null: false
   end
 end