Unable to pass 'description' using Cashier

Hi all,

Anyone found a work around or even the correct way to add an item description when using Cashier's single charge?

I currently have, which all passes to Stripe correctly but not the description.

$charged = $user->charge($totalPrice, [
            'source' => $token,
            'receipt_email' => $user->email,
            'description' => $request->input('description'),
            'metadata' => [
                'email' => $user->email,
                'name'  => $user->first_name .' ' . $user->surname,
            ]
        ]);
        return $this->checkChargable($charged);