diff --git a/dns/42.10.in-addr.arpa b/dns/42.10.in-addr.arpa
index e7c36b5..1609b18 100644
--- a/dns/42.10.in-addr.arpa
+++ b/dns/42.10.in-addr.arpa
@@ -1,5 +1,5 @@
 @     IN SOA   higgsboson.tk. hostmaster (
-                        308       ; serial
+                        309       ; serial
                         1H        ; refresh
                         4H        ; retry
                         3W        ; expire
diff --git a/dns/vpn.zone b/dns/vpn.zone
index e03bd13..8deff13 100644
--- a/dns/vpn.zone
+++ b/dns/vpn.zone
@@ -1,5 +1,5 @@
 @     IN SOA   higgsboson.tk. hostmaster (
-                        304       ; serial
+                        305       ; serial
                         1H        ; refresh
                         4H        ; retry
                         3W        ; expire