diff --git a/internal/domain/welcome_message.go b/internal/domain/welcome_message.go
index 28042f11..29b74b47 100644
--- a/internal/domain/welcome_message.go
+++ b/internal/domain/welcome_message.go
@@ -16,7 +16,7 @@ import (
 // render it as a tappable link; the mention itself lives in the default
 // templates in login_welcome_template.go (or an admin-panel override), not
 // hardcoded here.
-const officialUpdatesChannelMention = "@zio"
+const officialUpdatesChannelMention = "@ziodotsh"
 
 // OfficialWelcomeMessage builds the account-visible incoming message sent
 // from the official system account on every completed sign-in (SignUp and
diff --git a/internal/rpc/channels_updates_rpc_test.go b/internal/rpc/channels_updates_rpc_test.go
index 4a1c09b9..f60ade23 100644
--- a/internal/rpc/channels_updates_rpc_test.go
+++ b/internal/rpc/channels_updates_rpc_test.go
@@ -2,10 +2,6 @@ package rpc
 
 import (
 	"context"
-	"github.com/iamxvbaba/td/clock"
-	"github.com/iamxvbaba/td/proto"
-	"github.com/iamxvbaba/td/tg"
-	"go.uber.org/zap/zaptest"
 	"strings"
 	appchannels "telesrv/internal/app/channels"
 	appupdates "telesrv/internal/app/updates"
@@ -13,6 +9,11 @@ import (
 	"telesrv/internal/domain"
 	"telesrv/internal/store/memory"
 	"testing"
+
+	"github.com/iamxvbaba/td/clock"
+	"github.com/iamxvbaba/td/proto"
+	"github.com/iamxvbaba/td/tg"
+	"go.uber.org/zap/zaptest"
 )
 
 func TestChannelRealtimeRecipientsPreferOnlineMembers(t *testing.T) {
@@ -662,7 +663,7 @@ func TestChannelSendMessageWithUnresolvableMentionSucceeds(t *testing.T) {
 		t.Fatalf("create megagroup: %v", err)
 	}
 	peer := &tg.InputPeerChannel{ChannelID: created.Channel.ID, AccessHash: created.Channel.AccessHash}
-	for i, text := range []string{"look at @zio", "hi @2cool and @_x"} {
+	for i, text := range []string{"look at @ziodotsh", "hi @2cool and @_x"} {
 		if _, err := r.onMessagesSendMessage(WithUserID(ctx, owner.ID), &tg.MessagesSendMessageRequest{
 			Peer:     peer,
 			Message:  text,