BilgehanArslan pardon me, I didn't mean just "security". If you want to look good without issues like this, avoid free domain names. I was talking about one particular domain provider that doesn't even have a secured connection, as I am not sure what provider are you using. Free domains are good when you need some dummy domain for testing, maybe redirects, but not good for production because they're just awful.
Domains aren't that expensive either, so just buy some to avoid troubles.