Error trying to update Lenny...

[Account for Debian group mail <debian@pcez.com>]

I'm trying to update Lenny and get the following error:

Reading package lists... Done
W: GPG error: http://archive.debian.org lenny/updates Release: The following signatures were invalid: KEYEXPIRED 1356982504
W: GPG error: http://archive.debian.org lenny/volatile Release: The following signatures were invalid: KEYEXPIRED 1358963195
W: You may want to run apt-get update to correct these problems


My source list looks like this:

deb http://archive.debian.org/debian-security lenny/updates main contrib
deb http://archive.debian.org/debian-volatile lenny/volatile main contrib
deb http://archive.debian.org/debian/ lenny main contrib non-free
deb http://archive.debian.org/debian-security lenny/updates main contrib
deb http://archive.debian.org/debian-volatile lenny/volatile main contrib


When I try to get an updated keyring:

apt-get install debian-archive-keyring
Reading package lists... Done
Building dependency tree
Reading state information... Done
debian-archive-keyring is already the newest version.


It tells me it is already up to date.

How can I get keyring that is not expired so I can up date this machine.

Thanks,

Ken