This article explains how to change your password. If you can't remember your password, please click here.
You'll first need to click on your name in the top right hand corner of your account page. You can then select 'Settings'.
Once you're on your settings page, select 'Password' from the left hand side, and then enter your current password followed by your preferred new password twice. You can then click 'Save'.
Please note - Your password cannot be changed if you are logged into TransferWise via Google+ or Facebook.