By Lanford Beard
Updated October 27, 2011 at 09:32 PM EDT

Warner Bros. has made a move to boost its sales by prohibiting Blockbuster from renting out its titles for a full 28 days after their release, reports the Financial Times. Moving forward under this decidedly firmer policy, Blockbuster will only be able to offer the films for sale during the first four weeks. This policy is already in effect for rental services including Redbox and Netflix, who are up for contract negotiations with Warner Bros. later this year. The policy shift comes soon after Blockbuster’s announcement that it would be creating its own streaming service similar to what Netflix offers. (Warner Bros., Blockbuster/DISH Network, Redbox, and Netflix have not responded to EW’s requests for comment.)