diff --git a/src/auth/telegram-bot-login.ts b/src/auth/telegram-bot-login.ts
index 66bf6f4..b6c086e 100644
--- a/src/auth/telegram-bot-login.ts
+++ b/src/auth/telegram-bot-login.ts
@@ -112,25 +112,22 @@ export async function fetchTelegramPhoto(fileId: string) {
   };
 }
 
-function formatRemaining(expiresAt: Date) {
-  const seconds = Math.max(0, Math.ceil((expiresAt.getTime() - Date.now()) / 1000));
-  const minutes = Math.floor(seconds / 60).toString();
-  const rest = (seconds % 60).toString().padStart(2, '0');
-  return `${minutes}:${rest}`;
+function formatLoginLifetime() {
+  const minutes = Math.ceil(config.botLoginMaxAgeSeconds / 60);
+  return `${minutes} мин`;
 }
 
 async function sendLoginMessage(
   chatId: number,
   text: string,
   token?: string,
-  expiresAt?: Date,
 ) {
   const replyMarkup = token
     ? {
         inline_keyboard: [
           [
             {
-              text: `Открыть MapFlow · ${formatRemaining(expiresAt ?? expiresIn(0))}`,
+              text: `Открыть MapFlow · ${formatLoginLifetime()}`,
               url: `${config.webAppUrl}?telegram_login=${encodeURIComponent(token)}`,
             },
           ],
@@ -245,5 +242,5 @@ export async function handleTelegramBotWebhook(
     },
   });
 
-  await sendLoginMessage(chatId, 'MapFlow', token, request.expiresAt);
+  await sendLoginMessage(chatId, 'MapFlow', token);
 }