Leap second 2016

As you guys probably know, on December 31 a leap second will occur.
I am well aware of the need to update the kernel, NTP and tzdata packages.
My question is: if my servers were prepared for the 2015 leap second, meaning I updated the kernel, tzdata and ntp packages to my servers so they won't be affected in 2015, do I need to update the packages again to overcome this year's leap second? Or are the 2015 "safe" kernel, tzdata and ntp packages still safe for this leap second?