diff --git a/crawler.go b/crawler.go
index 977a342..2977e1a 100644
--- a/crawler.go
+++ b/crawler.go
@@ -46,7 +46,7 @@ func crawlIP(s *dnsseeder, r *result) ([]*wire.NetAddress, *crawlError) {
 	onAddr := make(chan *wire.MsgAddr)
 	peerCfg := &peer.Config{
 		UserAgentName:    "dnsseeder", // User agent name to advertise.
-		UserAgentVersion: "1.0.1",     // User agent version to advertise.
+		UserAgentVersion: "1.1.0",     // User agent version to advertise.
 		Services:         0,
 		Listeners: peer.MessageListeners{
 			OnAddr: func(p *peer.Peer, msg *wire.MsgAddr) {
@@ -68,10 +68,12 @@ func crawlIP(s *dnsseeder, r *result) ([]*wire.NetAddress, *crawlError) {
 			},
 		},
 	}
-	// Assume testnet 3 if we are using a testnet port!
-	if s.port == 18333 {
+	switch s.id {
+	case 0xf4f3e5f4:
 		peerCfg.ChainParams = &chaincfg.TestNet3Params
-	} else {
+	case 0xafdab7e2:
+		peerCfg.ChainParams = &chaincfg.TestNet4Params
+	default:
 		peerCfg.ChainParams = &chaincfg.MainNetParams
 	}
 	p, err := peer.NewOutboundPeer(peerCfg, r.node)