Spammed of PONGs from irc.gitter.im

Created by: s0r00t

Since I use irc.gitter.im, I get spammed with PONGs from the server :

22:29 [Gitter] PONG received from irc.gitter.im: 
22:30 [Gitter] PONG received from irc.gitter.im: 
22:31 [Gitter] PONG received from irc.gitter.im: 

I have no particular client, irssi+ZNC.