To change the WordPress administrator password, you can follow the steps below:

1. Log in to the WordPress dashboard: Log in to your WordPress dashboard with your admin username and current password.
2. Navigate to the profile page: In the left navigation bar of the dashboard, find and click on the "Users" or "Profile" option.
3. Enter the password settings: At the bottom of the user or profile page, you will find the "Account Management" section. In that section, click on the "Generate a new password" link.
4. Generate a new password: WordPress will generate a new random password, which you can use directly or change it to your favorite password.
5. Save changes: Once you have entered your new password, be sure to click the "Update Profile" button at the bottom of the page to save your changes.

Thus, your WordPress administrator password has been successfully changed. Please make sure that the new password is secure enough and it is recommended to include letters, numbers and special characters for added security.