1) Log in to your personal STS account
2)Once logged in, click on "Hello 'first name last name'" at the top right of your screen.
3)Click on "My account".
4)Click on the 'edit' pen at the bottom right of your screen.
5)Change your password.
You must enter at least 8 characters, including 1 capital letter, 1 special character and 1 number.
6)Save your password change.