Http to https

I’m a beginer using concrete5.6.3.3
I was wondering how could I make a change http to https without using cloud flare, is there anyway or if it’s possible. suggestion will be much appreciated,

First make sure your web server has a valid SSL certificate for your domain.
Then add a definition line in your root/config/site.php file thus:
define(‘BASE_URL’, ‘https://(your domain name here)’;

Dear ConcreteOwl,
Thank you so much for your advise,
I’ll do that to check my server if they have SSL certificate first,
and try to follow as your advise,