diff --git a/main.go b/main.go
index 36adc30..8fa93d6 100644
--- a/main.go
+++ b/main.go
@@ -102,6 +102,12 @@ func main() {
 		policies.ValidateKind,
 		policies.PreventTimestampsInThePast(600),
 		policies.PreventTimestampsInTheFuture(60),
+		func(ctx context.Context, event *nostr.Event) (reject bool, msg string) {
+			if event.Kind == 20001 {
+				return true, "kind 20001 events are not allowed"
+			}
+			return false, ""
+		},
 	)
 
 	policies.ApplySaneDefaults(relay)