Hi, I know GPG issues with the Debian packages came up several time on the list already, but more specifically, the GPG key listed here is outdated: https://bird.network.cz/?download&tdir=debian/ The files apt.gpg and apt.key contain key AC0E47584A7A714D from 2014-09-09 called "CZ.NIC Labs Archive Automatic Signing Key <ftpmaster@labs.nic.cz>". This key is revoked on key servers, and packages are signed with the newer key B188E2B695BD4743. Could you update the key in the webpage listed above? Thanks, Baptiste