diff --git a/db/migrate/20251010153708_add_message_id_header_and_parent_id_to_message.rb b/db/migrate/20251010153708_add_message_id_header_and_parent_id_to_message.rb
new file mode 100644
index 0000000..0732a07
--- /dev/null
+++ b/db/migrate/20251010153708_add_message_id_header_and_parent_id_to_message.rb
@@ -0,0 +1,6 @@
+class AddMessageIdHeaderAndParentIdToMessage < ActiveRecord::Migration[7.1]
+  def change
+    add_column :messages, :message_id_header, :string
+    add_column :messages, :parent_id, :integer
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 97384ac..4ebda35 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -24,6 +24,8 @@
     t.integer "list_id"
     t.integer "list_seq"
     t.timestamptz "published_at"
+    t.string "message_id_header"
+    t.integer "parent_id"
     t.index ["body"], name: "index_messages_on_body", opclass: :gin_trgm_ops, using: :gin
     t.index ["list_id", "list_seq"], name: "index_messages_on_list_id_and_list_seq", unique: true
   end