Best practices for radio buttons with number options?

I'm redesigning a form that includes a Priority dropdown, this field has 5 options: 1, 2, 3, 4 and 5. One being the most important priority and five the least important.

Given that there are 5 options I believe a radio button would be the best idea, but, at the same time I don't think there is sense in having a conventional radio button just for 1 character each.

I tried this, but I'm not sure:

Are there any best practices in this case? Is there a better way to convey this?