diff --git a/service/rpc/versions.go b/service/rpc/versions.go
index 10f450fc..c469bed0 100644
--- a/service/rpc/versions.go
+++ b/service/rpc/versions.go
@@ -24,6 +24,6 @@ const (
 )
 
 var (
-	MiddlewareVersion = "0.8.5"
+	MiddlewareVersion = "0.9.1"
 	NodeVersion       = params.Version
 )