Hi all, if you are using ppa php repository from Ondrej Sury there is gpg key expiration and new key needs to be added, symptoms is after apt-get update you get failed to fetch with "The following signatures were invalid: EXPKEYSIG B188E2B695BD4743 DEB.SURY.ORG" Just 3 commands to reflect gpg change. Code: apt-key del B188E2B695BD4743 Code: wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg Code: apt-get update More info on https://github.com/oerdnj/deb.sury.org/issues/1575