Whether you're an owner or a pet sitter, you can update your email address on your profile. However, this can be done only on the website, at the moment.
Once logged in, go to your Profile > My profile > About me, and then you'll see this:
After you click on "Change your email" a confirmation email will be sent to the new email address.
Note: If you no longer have access to the email address you used to create your account, then contact our Support.