Manually adding HSTS security headers

Hello,

Thanks in advance for your help. I am having trouble getting an A+ on security of my website. I used to have it at an A+ but it the headers seemed to got erased.

When I follow the same instructions as before on the linked page (when I was an A+) it doesn’t seem to work. I manually add the HSTS security header to my .htaccess file.

Now I get an A. I can’t think of anything that changed besides an updated WordPress version.

Am I missing something?

Thanks,

• This topic was modified 53 minutes ago by Yui. Reason: mv to fixing wp

The page I need help with: [log in to see the link]