Arris G54 Upload Speed

I recently bought the Arris G54 modem and it is connected to my xfinity internet but I am still capped at 40Mbps upload speed after xfinity provisioned it. I get 1400Mbps download speed but not the 200Mbps upload speed I should be getting. I have read other posts of people with the same modem getting the advertised 200Mbps upload speed. Why am I not getting the new upload speed? Do I just need the correct boot file saved to the modem? Any help would be appreciated.