Debian Wheezy repository

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.

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