Party/Empire site security certificate

[BigBiceps]

Whenever I click on My account from party on my new computer, it says "The security certificate was issued by a company you have not chosed to trust. View the certificate to determine whether you want to trust the certifying authority"

I then view and accept the certificate. However, the next time I do this it comes up again.

How do I stop it from doing this?

Some browsers give you the option to accept the certificate permanently. Choose that.