Node.js request CERT_HAS_EXPIRED

I'm using Mikeal's request (https://github.com/mikeal/request) to make an https request to a server. However, I keep getting an authorization error of CERT_HAS_EXPIRED.

request({
        url: 'https://www.domain.com/api/endpoint',
        strictSSL: false
    }, function(error, response, body) {
        if(!error && response.statusCode == 200) {
            res.json(JSON.parse(body));
        } else {
           res.json(response.statusCode, {'error': 'error'})
        }
});

I've tried setting strictSSL to true and false, both output same error of CERT_HAS_EXPIRED. What is causing this issue and is there any way to fix it in nodejs?