SPF

My business email is hosted through Homestead, and my domain DNS is managed elsewhere. Gmail is rejecting messages because the sending IPs are not covered in my current SPF record.

I don’t want to keep manually updating SPF every time your outbound IPs change. Could you please confirm, what is the official include statement (e.g. include:websitewelcome.com or another domain) that will always cover all of your outbound IP ranges?