diff --git a/version/version.go b/version/version.go
index 5fab0a2c..49915430 100644
--- a/version/version.go
+++ b/version/version.go
@@ -6,7 +6,7 @@ func Moleculer() string {
 }
 
 func MoleculerProtocol() string {
-	return "3"
+	return "4"
 }
 
 func Go() string {