Step 3 - Loading maps and addons Edit. I get to the end where it says Vac secure mode activated and under that it says " Your server is out of date please update your server and restart" how do i update it. Promote your own DarkRP server to get more players. Now type in " app_ update 4020". Aug 13, · Updating dedicated Gmod server; SRCDS & SteamCMD.