diff --git a/cmd/signaldctl/cmd/account/register/register-account.go b/cmd/signaldctl/cmd/account/register/register-account.go
index b2c92c0..95ca2a9 100644
--- a/cmd/signaldctl/cmd/account/register/register-account.go
+++ b/cmd/signaldctl/cmd/account/register/register-account.go
@@ -16,13 +16,16 @@
 package register
 
 import (
+	"encoding/json"
+	"fmt"
 	"log"
+	"os"
 
 	"github.com/spf13/cobra"
+	"gopkg.in/yaml.v2"
 
 	"gitlab.com/signald/signald-go/cmd/signaldctl/common"
-	"gitlab.com/signald/signald-go/signald"
-	"gitlab.com/signald/signald-go/signald/client-protocol/v0"
+	v1 "gitlab.com/signald/signald-go/signald/client-protocol/v1"
 )
 
 var (
@@ -39,27 +42,32 @@ var (
 			}
 		},
 		Run: func(_ *cobra.Command, args []string) {
-			requestID := signald.GenerateID()
-			err := common.Signald.RawRequest(v0.LegacyRequest{
-				Type:     "register",
-				ID:       requestID,
-				Username: args[0],
-				Voice:    voice,
-				Captcha:  captcha,
-			})
-			if err != nil {
-				log.Fatal("error sending request to signald: ", err)
+			go common.Signald.Listen(nil)
+			req := v1.RegisterRequest{
+				Account: args[0],
+				Voice:   voice,
+				Captcha: captcha,
 			}
-			c := make(chan v0.LegacyResponse)
-			go common.Signald.Listen(c)
-			response := signald.GetLegacyResponse(c, requestID)
-			switch response.Type {
-			case "verification_required":
-				log.Println("verification code requested. submit with: signaldctl account verify", args[0], "<code>")
-			case "captcha_required":
-				log.Println("captcha required. Please provide a captcha token with the --captcha argument (see https://gitlab.com/signald/signald/-/wikis/Captchas)")
+			resp, err := req.Submit(common.Signald)
+			if err != nil {
+				log.Fatal("error: ", err)
+			}
+
+			switch common.OutputFormat {
+			case common.OutputFormatJSON:
+				err := json.NewEncoder(os.Stdout).Encode(resp)
+				if err != nil {
+					log.Fatal(err, "error encoding response to stdout")
+				}
+			case common.OutputFormatYAML:
+				err := yaml.NewEncoder(os.Stdout).Encode(resp)
+				if err != nil {
+					log.Fatal(err, "error encoding response to stdout")
+				}
+			case common.OutputFormatDefault:
+				fmt.Println("submit verification code with signaldctl account verify ", resp.AccountId, "000000")
 			default:
-				log.Fatalf("unexpected response from signald when requesting verification code: %+v", response)
+				log.Fatal("Unsupported output format")
 			}
 		},
 	}
diff --git a/go.sum b/go.sum
index 22b84e4..b5b15ab 100644
--- a/go.sum
+++ b/go.sum
@@ -76,6 +76,7 @@ github.com/mitchellh/mapstructure v1.1.2/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e h1:fD57ERR4JtEqsWbfPhv4DMiApHyliiK5xCTNVSPiaAs=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
+github.com/oklog/ulid v1.3.1 h1:EGfNDEx6MqHz8B3uNV6QAib1UR2Lm97sHi3ocA6ESJ4=
 github.com/oklog/ulid v1.3.1/go.mod h1:CirwcVhetQ6Lv90oh/F+FBtV6XMibvdAFo93nm5qn4U=
 github.com/pelletier/go-toml v1.2.0 h1:T5zMGML61Wp+FlcbWjRDT7yAxhJNAiPPLOFECq181zc=
 github.com/pelletier/go-toml v1.2.0/go.mod h1:5z9KED0ma1S8pY6P1sdut58dfprrGBbd/94hg7ilaic=