diff --git a/wire/msgversion.go b/wire/msgversion.go
index 44ecac1d6..55bdc1359 100644
--- a/wire/msgversion.go
+++ b/wire/msgversion.go
@@ -18,7 +18,7 @@ import (
 const MaxUserAgentLen = 256
 
 // DefaultUserAgent for wire in the stack
-const DefaultUserAgent = "/btcwire:0.4.1/"
+const DefaultUserAgent = "/btcwire:0.5.0/"
 
 // MsgVersion implements the Message interface and represents a bitcoin version
 // message.  It is used for a peer to advertise itself as soon as an outbound