diff --git a/db/migrate/20190724055909_move_to_managed_authenticator.rb b/db/migrate/20190724055909_move_to_managed_authenticator.rb
index 09cc1d4..6427ad7 100644
--- a/db/migrate/20190724055909_move_to_managed_authenticator.rb
+++ b/db/migrate/20190724055909_move_to_managed_authenticator.rb
@@ -22,4 +22,8 @@ class MoveToManagedAuthenticator < ActiveRecord::Migration[5.2]
     DO NOTHING
     SQL
   end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration
+  end
 end