Membership plugin- Creating Subscriptions Over $300

First of all I want to thank the staff for offering such fantastic products. My one month subscription here is the best $79 I have spent in a long time. Thanks for all you do.

I'm setting up my membership plugin and I have run into a problem; I want to charge more than $300 for a subscription. Currently, the dropdown menu in the Price variable for adding a new subscription has a maximum of only $300. Is there any way to change this variable so that I can charge $499?

Thanks for your time and feedback...Jeff