diff --git a/healthcheck/healthcheck.cfg.example b/healthcheck/healthcheck.cfg.example
index 0556442..525c234 100644
--- a/healthcheck/healthcheck.cfg.example
+++ b/healthcheck/healthcheck.cfg.example
@@ -215,4 +215,5 @@ COMMAND=echo "Core meltdown!"
 # 	1 1 * * *       root    apt update
 DISABLED=True
 ALARM_STRING_EQUAL=security updates available
+REGEXP=.*\n(security updates available)
 COMMAND=apt list --upgradable 2>/dev/null | grep -e "-security" && echo "security updates available" || echo "NO security updates available"