PHP 5.6.9 contains security vulnerabilites, please ship version 5.6.10
The stable main repository still contains PHP 5.6.9 although this version contains multiple security vulnerabilities which have been fixed in version 5.6.10:
https://php.net/releases/5\_6\_10.php
https://php.net/ChangeLog-5.php\#5.6.10
Version 5.6.10 seems to be in edge already, but is not in the stable repository.
(from redmine: issue id 4349, created on 2015-06-15, closed on 2015-09-21)