The bad news is your website may be out of date – and that can lose you customers who may perceive the current site as unprofessional. The good news is with an audit of what can be improved and some intentionality; it doesn’t have to be brain surgery to get your site back in tip-top shape.
I'd strongly suggest working on a significant upgrade to your website (at least) every 5 years. But more importantly than that – incremental improvements to your websites should be common, monthly, and potentially weekly even.
Incremental improvements all you to create familiarity with your audience, but also so that little things get resolved, and improved.
Ideally these incremental improvements are based on analytics, testing, and feedback from people who visit your site, ideal clients and customers that you talk to in your sales cycle.
New opportunities are popping up regularly for different types of marketing strategies – that mean you should be thinking of your website as a living organism, not a dead artifact.
It needs to be watered, nurtured, trimmed and regularly tended to if it's going to grow into a thriving lead and sales-generation machine.