diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0fc6ab5..3887554 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,7 @@
 ## Unreleased
+- Defer the catalog zone SOA serial increment on zone deletion to `transaction.on_commit`, matching
+  the create/modify path. Previously the increment ran immediately at `post_delete` time, so a
+  rollback of the delete transaction would have left the catalog serial bumped anyway.
 - Add the option to send a NOTIFY directly to a zone's own nameservers when its SOA serial number
   changes. Enable it per zone via a boolean custom field named by `notify_ns_custom_field_name`,
   globally for all zones via `notify_ns_all_zones` (default `False`), or both. Nameserver addresses
diff --git a/netbox_dns_bridge/signals/netbox_dns_zones.py b/netbox_dns_bridge/signals/netbox_dns_zones.py
index bf8b1c2..fcb1747 100644
--- a/netbox_dns_bridge/signals/netbox_dns_zones.py
+++ b/netbox_dns_bridge/signals/netbox_dns_zones.py
@@ -72,7 +72,10 @@ def zone_post_save(sender, instance, created, **kwargs):
 
 @receiver(post_delete, sender=Zone)
 def zone_post_delete(sender, instance, **kwargs):
-    catzm.increment_soa_serial()
+    def _on_commit():
+        catzm.increment_soa_serial()
+
+    transaction.on_commit(_on_commit)
 
 
 def _notify_ns_enabled(zone) -> bool: