diff --git a/router/protocol.go b/router/protocol.go
index 0fc548c6..d42c5cbd 100644
--- a/router/protocol.go
+++ b/router/protocol.go
@@ -2,7 +2,7 @@ package router
 
 const (
 	Protocol        = "weave"
-	ProtocolVersion = 15
+	ProtocolVersion = 16
 )
 
 type ProtocolTag byte