– Update to 4.0.3
– Security fix for CVE-2016-2120, CVE-2016-7068, CVE-2016-7072, CVE-2016-7073, CVE-2016-7074

Release notes 4.0.2: https://doc.powerdns.com/md/changelog/#powerdns-authoritative-server-402
Release notes 4.0.3: https://doc.powerdns.com/md/changelog/#powerdns-authoritative-server-403