Plz Update Modpack Tekkit-Volts

hello, im started using aternos so me and my friends can play with each other. One of my friends wanted to add a mod pack call volts, i found it and installed it onto my server. Then we all installed voltz and tried to log on but it said outdated server so I had to downgrade to 1.0.11 and it still didnt work. Plz update it so me and my friends can play on it ASAP
Thx,
DoubleJ343