Proxmox VE sources.list

Dear Communty members,

I'm using a proxmox server that my Server Provider proposed vs a VMware ESX.

The server is 2 years running and the sources.list stay on original version.

Dead I update the repo server ?

Original Sources :

## Debian Squeeze sources.list

## Debian.org FR mirror
deb http://ftp.fr.debian.org/debian/ squeeze main contrib non-free
deb-src http://ftp.fr.debian.org/debian/ squeeze main contrib non-free

## Debian security updates
deb http://security.debian.org/ squeeze/updates main contrib non-free
deb-src http://security.debian.org/ squeeze/updates main contrib non-free

# PVE packages provided by proxmox.com
deb http://download.proxmox.com/debian squeeze pve