US servers will be brought offline on Tuesday, June 9, 2015 at 7am PT for an update. EU servers will come down at 9pm PT (5am London Time on June 10th) for their update. Estimated downtime for both sets of servers is approximately one hour. Here are the patch notes:

POPULATION / ZONE PROGRESSION
F.S. Distillery: Stowaways [Event Heroic] and [Challenge]
The curable version of Supply Chain will no longer target mercenaries.

MERCENARIES
Lady Gretta Cheroon should now be a female when casting illusions on her.