diff --git a/cmd/lk/sip.go b/cmd/lk/sip.go
index 281eedac..43e26dc3 100644
--- a/cmd/lk/sip.go
+++ b/cmd/lk/sip.go
@@ -140,6 +140,10 @@ var (
 									Required: true,
 									Usage:    "`SIP URL` to transfer the call to. Use 'tel:<phone number>' to transfer to a phone",
 								},
+								&cli.BoolFlag{
+									Name:  "play-dialtone",
+									Usage: "if set, a dial tone will be played to the SIP participant while the transfer is being attempted",
+								},
 							},
 						},
 					},
@@ -478,11 +482,13 @@ func createSIPParticipantLegacy(ctx context.Context, cmd *cli.Command) error {
 func transferSIPParticipant(ctx context.Context, cmd *cli.Command) error {
 	roomName, identity := participantInfoFromArgOrFlags(cmd)
 	to := cmd.String("to")
+	dialtone := cmd.Bool("play-dialtone")
 
 	req := livekit.TransferSIPParticipantRequest{
 		RoomName:            roomName,
 		ParticipantIdentity: identity,
 		TransferTo:          to,
+		PlayDialtone:        dialtone,
 	}
 
 	cli, err := createSIPClient(cmd)
diff --git a/go.mod b/go.mod
index 056bba18..a0025e1d 100644
--- a/go.mod
+++ b/go.mod
@@ -12,7 +12,7 @@ require (
 	github.com/go-logr/logr v1.4.2
 	github.com/go-task/task/v3 v3.39.2
 	github.com/joho/godotenv v1.5.1
-	github.com/livekit/protocol v1.26.0
+	github.com/livekit/protocol v1.26.1-0.20241022031344-538889e5de0a
 	github.com/livekit/server-sdk-go/v2 v2.3.0
 	github.com/pion/rtcp v1.2.14
 	github.com/pion/rtp v1.8.9
diff --git a/go.sum b/go.sum
index cf2219ab..54baccc8 100644
--- a/go.sum
+++ b/go.sum
@@ -125,8 +125,8 @@ github.com/livekit/mageutil v0.0.0-20230125210925-54e8a70427c1 h1:jm09419p0lqTkD
 github.com/livekit/mageutil v0.0.0-20230125210925-54e8a70427c1/go.mod h1:Rs3MhFwutWhGwmY1VQsygw28z5bWcnEYmS1OG9OxjOQ=
 github.com/livekit/mediatransportutil v0.0.0-20240730083616-559fa5ece598 h1:yLlkHk2feSLHstD9n4VKg7YEBR4rLODTI4WE8gNBEnQ=
 github.com/livekit/mediatransportutil v0.0.0-20240730083616-559fa5ece598/go.mod h1:jwKUCmObuiEDH0iiuJHaGMXwRs3RjrB4G6qqgkr/5oE=
-github.com/livekit/protocol v1.26.0 h1:BAA2mKOHsJEEQCfgkllNyKpNpC0136A0pDiCvr7JYV4=
-github.com/livekit/protocol v1.26.0/go.mod h1:nxRzmQBKSYK64gqr7ABWwt78hvrgiO2wYuCojRYb7Gs=
+github.com/livekit/protocol v1.26.1-0.20241022031344-538889e5de0a h1:31YXXJLEwCflp7KEe9rRAwmONyCwHFujTl4MdxegTxw=
+github.com/livekit/protocol v1.26.1-0.20241022031344-538889e5de0a/go.mod h1:nxRzmQBKSYK64gqr7ABWwt78hvrgiO2wYuCojRYb7Gs=
 github.com/livekit/psrpc v0.6.1-0.20240924010758-9f0a4268a3b9 h1:33oBjGpVD9tYkDXQU42tnHl8eCX9G6PVUToBVuCUyOs=
 github.com/livekit/psrpc v0.6.1-0.20240924010758-9f0a4268a3b9/go.mod h1:CQUBSPfYYAaevg1TNCc6/aYsa8DJH4jSRFdCeSZk5u0=
 github.com/livekit/server-sdk-go/v2 v2.3.0 h1:k6kpBwJNZYUypv9567hfmLpxQumL463dNGUBfoF0bzQ=