A new version of WordPress should be out next week. They're saying April 22nd:
WordPress 4.2 Release Candidate (wordpress.org)
The release candidate for WordPress 4.2 is now available.
We’ve made more than 140 changes since releasing Beta 4 a week and a half ago. RC means we think we’re done, but with millions of users and thousands of plugins and themes, it’s possible we’ve missed something. We hope to ship WordPress 4.2 on Wednesday, April 22, but we need your help to get there.
We'll post a note when it's ready and then let our clients know about doing this upgrade.