[VOL-3419] Supporting new flow format.
Releasing version 1.3.0

Change-Id: Ie35c06c62797cc5966305a0a82492600a0dec871
diff --git a/internal/bbsim/types/interfaces.go b/internal/bbsim/types/interfaces.go
index 6a12136..380af34 100644
--- a/internal/bbsim/types/interfaces.go
+++ b/internal/bbsim/types/interfaces.go
@@ -17,7 +17,7 @@
 package types
 
 import (
-	"github.com/opencord/voltha-protos/v3/go/openolt"
+	"github.com/opencord/voltha-protos/v4/go/openolt"
 )
 
 // represent a gRPC stream