diff --git a/DnsServerCore/Dns/Zones/SecondaryZone.cs b/DnsServerCore/Dns/Zones/SecondaryZone.cs
index a20f6585..5cb132ac 100644
--- a/DnsServerCore/Dns/Zones/SecondaryZone.cs
+++ b/DnsServerCore/Dns/Zones/SecondaryZone.cs
@@ -475,6 +475,8 @@ namespace DnsServerCore.Dns.Zones
                             ClearZoneHistory();
                         }
 
+                        _lastModified = DateTime.UtcNow;
+
                         //trigger notify
                         TriggerNotify();