diff --git a/db/migrate/20230722054450_turn_invoice_amount_to_float.rb b/db/migrate/20230722054450_turn_invoice_amount_to_float.rb
index 852e6b57918d20fc930c108fe37ef5fcce52ca76..b62d96fb85b7cbae8a5f08c6c228122b2bb4a4c8 100644
--- a/db/migrate/20230722054450_turn_invoice_amount_to_float.rb
+++ b/db/migrate/20230722054450_turn_invoice_amount_to_float.rb
@@ -1,9 +1,14 @@
 class TurnInvoiceAmountToFloat < ActiveRecord::Migration[7.0]
-  def change
+  def up
     add_column :universities, :contribution_amount, :float
     University.find_each do |university|
       university.update_column :contribution_amount, university.invoice_amount.to_f
     end
     remove_column :universities, :invoice_amount
   end
+
+  def down
+    remove_column :universities, :contribution_amount, :float
+    add_column :universities, :invoice_amount, :string
+  end
 end