for Windows:
rAthena\src\custom\defines_pre.h
#define PACKETVER 20170517
for Linux:
run the following command
./configure --enable-packetver=20170517
rAthena\src\map\clif_packetdb.h (the packets not completely work 100% so if you have problem post it here maybe someone will help you fix it)
(this already added to official rathena no need to add it manually anymore)
EDIT: packets can be find here >> https://github.com/rathena/rathe