This is how:
- Login to Wordpess: http://yourwebsite.com/wp-login.php
- Click -> Settings -> General.
- Change both the Wordpress address and Site Address to read: https://yourwebsite.com.
- Click Save Changes.
- Click Permalinks.
- Click Save Changes (yes, you don't actually change anything on the Permalinks page, you only click Save Changes.)
That'll be it!