Advice on moving in with your SO

So my SO and i have been talking about possibly moving in together by the end of the year or early next year. We are super excited about it and started to look at places. However i still live at home with my very traditional parents and I’m not sure how to tell them I’m moving in with him. This goes against what they taught me about not living with a man until your married but we do love each other and feel like this is a good step in the right direction.