Debian wheezy, update repository

Solution 1:

You can still use the archive repository but there is no more updates:

deb http://archive.debian.org/debian wheezy main
deb http://archive.debian.org/debian-archive/debian-security/ wheezy updates/main

Solution 2:

Debian wheezy is no longer supported. It is two major releases older than stable. It has not received any updates since 31 May 2018.

The resolution is to dist-upgrade to oldstable, or to stable.