Changing a foreign key constraint in a Laravel migration

I have this migration file

Schema::create('table_one', function(Blueprint $table) 
{ 
    $table->increments('id'); 
    $table->string('name'); 
    $table->integer('table_two_id')->unsigned(); 
    $table->foreign('table_two_id')->references('id')->on('table_two'); 
    $table->timestamps(); 
});

I want to update to make the foreign key cascade on delete, as though I had run this:

$table->foreign('table_two_id')->references('id')->on('table_two')->onDelete('cascade');

How can I do this? Is there something like change() for foreign keys?

Drop the foreign key then add it again and run migrate.

public function up()
{
    Schema::table('table_one', function (Blueprint $table) {
        $table->dropForeign(['table_two_id']);

        $table->foreign('table_two_id')
            ->references('id')
            ->on('table_two')
            ->onDelete('cascade');
    });
}