If you are already connected to the site:

The "Settings" tab located at the top right corner of the website in the menu or directly from the settings icon from your mobile allows you to manage all your account, your contact email and password, manage privacy (your filters, your activity, access to your private albums) your nicknames ignored from the "blocking" section, your email alerts, your subscription and all the data that can be managed in your account.

In the general menu click "manage" at the password section, you will then have to enter your old password and the new one you have chosen.

If you are not connected to the website or don't remember your previous password, go to the following section :

I forgot my password

Web version : 

Mobile version :