deb-src http://security.debian.org/ wheezy/updates main contrib
# backports:
- deb http://ftp.debian.org/debian wheezy-backports main
- deb-src http://ftp.debian.org/debian wheezy-backports main
+ deb http://ftp.debian.org/debian/ wheezy-backports main contrib non-free
+ deb-src http://ftp.debian.org/debian/ wheezy-backports main contrib non-free
# official debian repository:
# deb http://ftp.debian.org/debian/ wheezy main contrib non-free