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

Change-Id: Ie35c06c62797cc5966305a0a82492600a0dec871
diff --git a/internal/bbsim/devices/helpers.go b/internal/bbsim/devices/helpers.go
index 6b3d220..722a1f1 100644
--- a/internal/bbsim/devices/helpers.go
+++ b/internal/bbsim/devices/helpers.go
@@ -23,7 +23,7 @@
 
 	"github.com/looplab/fsm"
 	"github.com/opencord/bbsim/internal/common"
-	"github.com/opencord/voltha-protos/v3/go/openolt"
+	"github.com/opencord/voltha-protos/v4/go/openolt"
 )
 
 type mode int