TokenMismatchException in VerifyCsrfToken.php line 68:

So im playing with Cashier trying to set up a subscription form

form looks like

<div>
    <form action="/" method="POST">
       <script
                src="https://checkout.stripe.com/checkout.js" class="stripe-button"
                data-key="pk_test_ylThVfhN9BlO4pdm4evJTeWi"
                data-amount="2181"
                data-name="OG Pokemon"
                data-description="monthly UK"
                data-image="https://stripe.com/img/documentation/checkout/marketplace.png"
                data-locale="auto"
                data-currency="gbp">
        </script>
    </form>
</div>

Posts to this route

Route::post('/', function() {
    $token = Input::get('stripeToken');
    Auth::user()->subscription('monthly')->create($token);
    return 'DONE';
});

and get this error

TokenMismatchException in VerifyCsrfToken.php line 68:

any ideas?

Thanks guys