SET UP SSL FOR NOPCOMMERCE AND WORDPRESS
In order to update for all these websites, first ,we need to ask the host to update the SSL from the server side.
Then, for WordPress, it would be much easier.
However, for Nopcommerce, the setting is different as below:
Go to the Administration->Configuration->Stores->Edit
Update the Store URL with HTTPS
Then enable the SSL
Finally, go to General And Miscellaneous Settings,under the tab of Security settings, click the Force SSL for all site pages