Redmine

Hi, I would like to know if it's possible to setup an automatic status change from New to Closed after current date has passed Issue's "End Date".

I need this because I've created a custom issue type called "Contract", and I'm using Start Date and End Date to determine the validity of the contract, all contract whose End Date > current date are Void. Currently I have to change them mannually, but as there are many contracts I would like Redmine to do it automatically.