diff --git a/lib/os/class.ISPConfigDebianOS.inc.php b/lib/os/class.ISPConfigDebianOS.inc.php
index e4d9b5e56fef999176549f4b012f17000ae273fb..071f483c42f1dab44522cd35d5135e2f40be8623 100644
--- a/lib/os/class.ISPConfigDebianOS.inc.php
+++ b/lib/os/class.ISPConfigDebianOS.inc.php
@@ -952,6 +952,15 @@ set alert ' . $monitEmail . '
 				file_put_contents('/etc/apt/apt.conf.d/20auto-upgrades', $unattendedupgrades, FILE_APPEND | LOCK_EX);
 			}
 		}
+
+		// Enable sury repo for unattended upgrades if sury repo is used
+		if(ISPConfig::wantsPHP() !== 'system') {
+			$replacements = array(
+				'Unattended-Upgrade::Origins-Pattern {' => 'Unattended-Upgrade::Origins-Pattern {
+	"site=packages.sury.org";'
+			);
+			$result = $this->replaceContents('/etc/apt/apt.conf.d/50unattended-upgrades', $replacements);
+		}
 	}
 
 	protected function shallCompileJailkit() {