diff --git a/dns/vpn.zone b/dns/vpn.zone
index a13e36f..3bcc5a5 100644
--- a/dns/vpn.zone
+++ b/dns/vpn.zone
@@ -1,5 +1,5 @@
 @     IN SOA   higgsboson.tk. hostmaster (
-                        305       ; serial
+                        306       ; serial
                         1H        ; refresh
                         4H        ; retry
                         3W        ; expire