WF reports that WP needs to be updated … but it's up to date

Hi,
See the message i get :

Your WordPress version is out of date

Current WordPress Version: 3.9.2
New WordPress Version: 3.9.2
Severity: Critical
Status New

NB : I use a WP network with domain mapping

Thanks for any idea or clue !

https://wordpress.org/plugins/wordfence/