Stripe throws invalid integer error

I am unable to charge the amount $49.99 in stripe. I am going through the following links but nothing workout

Stripe Checkout Price error - Invalid Integer

Stripe Rails: Invalid integer: 1.06

I would like to charge the amount as it is. I don't want to round off the payment

 stripe.charges.create({
    // Charge the customer in stripe
// amount: req.query.amount,
    amount: 49.99,
    currency: 'usd',
    customer: req.customer
  }).then(function(charge) {
    // Use and save the charge info in our db
    var successTransaction = {
      stripeId: charge.customer,
      transactionId: charge.id,
      amount: charge.amount,
      currency: charge.currency,
      message: charge.outcome.seller_message,
      paidStatus: charge.paid,
      summary: charge
    };