PTO Policy

We are implementing a new PTO policy. Of course change makes people upset. Question we have is this. We are going to a 1/1 reset of PTO. Our PTO goes from 0-1 year, 5 days. If we hire someone in let's say Feb. so from Feb to Dec we pro-rate the 5 days. on 1/1 the PTO is still for the 0-1 year, 5 days. It does not seem fair to make someone wait until 1/1 of the next year to get to the next level of 1-5 years, 10 days. How should we handle this? Any suggestions are appreciated. HR is not my background. We are a small company with only 30 employees.