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

Change-Id: Ie35c06c62797cc5966305a0a82492600a0dec871
diff --git a/internal/bbsim/responders/igmp/igmp.go b/internal/bbsim/responders/igmp/igmp.go
index 5390347..ae1f36c 100644
--- a/internal/bbsim/responders/igmp/igmp.go
+++ b/internal/bbsim/responders/igmp/igmp.go
@@ -24,7 +24,7 @@
 	"github.com/google/gopacket"
 	"github.com/google/gopacket/layers"
 	bbsim "github.com/opencord/bbsim/internal/bbsim/types"
-	"github.com/opencord/voltha-protos/v3/go/openolt"
+	"github.com/opencord/voltha-protos/v4/go/openolt"
 	log "github.com/sirupsen/logrus"
 )