To update your credit card information:
Login to your OutboundEngine Account at app.outboundengine.com/#accountsettings
From there, click on Billing Info → Change Billing Info
In the dialog box that appears, enter your new card information and click Save.
In the upper-right corner of the page, click Done.
You can always give us a call at 888-988-5526 and we would be happy to update your credit card for you over the phone. Thanks and please let us know if there is anything else we can do to assist. Have a great day!