diff --git a/zcash/client.go b/zcash/client.go
index 1c3109b..de0d7f9 100644
--- a/zcash/client.go
+++ b/zcash/client.go
@@ -40,7 +40,7 @@ var defaultPeerConfig = &peer.Config{
 	// TODO: fork https://github.com/gtank/btcd/blob/master/peer/peer.go
 	//       and set MinAcceptableProtocolVersion based on the most recently activated network upgrade
 	//       see ticket #10 for details
-	ProtocolVersion: 170015, // Zcash NU5 testnet (second activation)
+	ProtocolVersion: 170017, // Zcash NU5 mainnet with addrv2
 }
 
 var (