LongView SSL Issue?

I am having some problems adding longview to a machine. I am running Debian 7.

I am getting this error …

root@server:~# bash <four-letter-code>Reading package lists... Done
Building dependency tree
Reading state information... Done
lsb-release is already the newest version.
lsb-release set to manually installed.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Failed to fetch https://apt-longview.linode.com/linode.gpg. Aborting install.
root@server:~# wget https://apt-longview.linode.com/linode.gpg
--2013-08-15 09:34:36--  https://apt-longview.linode.com/linode.gpg
Resolving apt-longview.linode.com (apt-longview.linode.com)... 97.107.139.216, 2600:3c03::4c
Connecting to apt-longview.linode.com (apt-longview.linode.com)|97.107.139.216|:443... connected.
ERROR: The certificate of `apt-longview.linode.com' is not trusted.
ERROR: The certificate of `apt-longview.linode.com' hasn't got a known issuer.</four-letter-code> 

Any ideas?