How can I sound more masculine?

Well, as the title says, I wanted to know if anyone here has had a similar problem or something like that. My voice has a quite thick, low timbre, but I'm so used to sounding much more high pitched that it's as if it were natural for me, and the deeper "tone" seems forced. I genuinely had no problem with it until someone pointed out that my voice sounded too high pitched for someone who looked like me. I don't know if it's paranoia or if I've just gotten used to speaking like this, but what should I do to make my voice sound more natural?