diff --git a/app/services/broadcast_service.py b/app/services/broadcast_service.py
index 5def4e4b..746e6b20 100644
--- a/app/services/broadcast_service.py
+++ b/app/services/broadcast_service.py
@@ -8,6 +8,7 @@ from typing import Optional
 
 from aiogram import Bot
 from aiogram.types import InlineKeyboardMarkup
+from sqlalchemy.exc import InterfaceError, SQLAlchemyError
 
 from app.database.database import AsyncSessionLocal
 from app.database.models import BroadcastHistory
@@ -22,6 +23,8 @@ logger = logging.getLogger(__name__)
 
 
 VALID_MEDIA_TYPES = {"photo", "video", "document"}
+LARGE_BROADCAST_THRESHOLD = 20_000
+PROGRESS_UPDATE_STEP = 5_000
 
 
 @dataclass(slots=True)
@@ -137,52 +140,53 @@ class BroadcastService:
 
             keyboard = self._build_keyboard(config.selected_buttons)
 
-            # Ограничение на количество одновременных отправок
-            semaphore = asyncio.Semaphore(20)
+            if len(recipients) > LARGE_BROADCAST_THRESHOLD:
+                logger.info(
+                    "Запускаем стабильный режим рассылки для %s получателей", len(recipients)
+                )
+                (
+                    sent_count,
+                    failed_count,
+                    cancelled_during_run,
+                ) = await self._run_resilient_broadcast(
+                    broadcast_id,
+                    recipients,
+                    config,
+                    keyboard,
+                    cancel_event,
+                )
+            else:
+                (
+                    sent_count,
+                    failed_count,
+                    cancelled_during_run,
+                ) = await self._run_standard_broadcast(
+                    broadcast_id,
+                    recipients,
+                    config,
+                    keyboard,
+                    cancel_event,
+                )
 
-            async def send_single_message(user):
-                """Отправляет одно сообщение с семафором ограничения"""
-                async with semaphore:
-                    if cancel_event.is_set():
-                        return False
+            if cancelled_during_run:
+                logger.info(
+                    "Рассылка %s была отменена во время выполнения, финальный статус уже установлен",
+                    broadcast_id,
+                )
+                return
 
-                    telegram_id = getattr(user, "telegram_id", None)
-                    if telegram_id is None:
-                        return False
+            if cancel_event.is_set():
+                logger.info(
+                    "Запрос на отмену рассылки %s пришел после завершения отправки, фиксируем итоговый статус",
+                    broadcast_id,
+                )
 
-                    try:
-                        await self._deliver_message(telegram_id, config, keyboard)
-                        return True
-                    except Exception as exc:  # noqa: BLE001
-                        logger.error(
-                            "Ошибка отправки рассылки %s пользователю %s: %s",
-                            broadcast_id,
-                            telegram_id,
-                            exc,
-                        )
-                        return False
-
-            # Отправляем сообщения пакетами для эффективности
-            batch_size = 100
-            for i in range(0, len(recipients), batch_size):
-                if cancel_event.is_set():
-                    await self._mark_cancelled(broadcast_id, sent_count, failed_count)
-                    return
-
-                batch = recipients[i:i + batch_size]
-                tasks = [send_single_message(user) for user in batch]
-                results = await asyncio.gather(*tasks, return_exceptions=True)
-
-                for result in results:
-                    if result is True:
-                        sent_count += 1
-                    else:
-                        failed_count += 1
-
-                # Небольшая задержка между пакетами для снижения нагрузки на API
-                await asyncio.sleep(0.1)
-
-            await self._mark_finished(broadcast_id, sent_count, failed_count, cancelled=False)
+            await self._mark_finished(
+                broadcast_id,
+                sent_count,
+                failed_count,
+                cancelled=False,
+            )
 
         except asyncio.CancelledError:
             await self._mark_cancelled(broadcast_id, sent_count, failed_count)
@@ -198,6 +202,127 @@ class BroadcastService:
                 return await get_custom_users(session, criteria)
             return await get_target_users(session, target)
 
+    async def _run_standard_broadcast(
+        self,
+        broadcast_id: int,
+        recipients: list,
+        config: BroadcastConfig,
+        keyboard: Optional[InlineKeyboardMarkup],
+        cancel_event: asyncio.Event,
+    ) -> tuple[int, int, bool]:
+        """Базовый режим рассылки для небольших списков."""
+
+        sent_count = 0
+        failed_count = 0
+
+        # Ограничение на количество одновременных отправок
+        semaphore = asyncio.Semaphore(20)
+
+        async def send_single_message(user):
+            """Отправляет одно сообщение с семафором ограничения"""
+            async with semaphore:
+                if cancel_event.is_set():
+                    return False
+
+                telegram_id = getattr(user, "telegram_id", None)
+                if telegram_id is None:
+                    return False
+
+                try:
+                    await self._deliver_message(telegram_id, config, keyboard)
+                    return True
+                except Exception as exc:  # noqa: BLE001
+                    logger.error(
+                        "Ошибка отправки рассылки %s пользователю %s: %s",
+                        broadcast_id,
+                        telegram_id,
+                        exc,
+                    )
+                    return False
+
+        # Отправляем сообщения пакетами для эффективности
+        batch_size = 100
+        for i in range(0, len(recipients), batch_size):
+            if cancel_event.is_set():
+                await self._mark_cancelled(broadcast_id, sent_count, failed_count)
+                return sent_count, failed_count, True
+
+            batch = recipients[i:i + batch_size]
+            tasks = [send_single_message(user) for user in batch]
+            results = await asyncio.gather(*tasks, return_exceptions=True)
+
+            for result in results:
+                if result is True:
+                    sent_count += 1
+                else:
+                    failed_count += 1
+
+            # Небольшая задержка между пакетами для снижения нагрузки на API
+            await asyncio.sleep(0.1)
+
+        return sent_count, failed_count, False
+
+    async def _run_resilient_broadcast(
+        self,
+        broadcast_id: int,
+        recipients: list,
+        config: BroadcastConfig,
+        keyboard: Optional[InlineKeyboardMarkup],
+        cancel_event: asyncio.Event,
+    ) -> tuple[int, int, bool]:
+        """Режим рассылки с периодическим обновлением статуса для больших списков."""
+
+        sent_count = 0
+        failed_count = 0
+
+        # Ограничение на количество одновременных отправок
+        semaphore = asyncio.Semaphore(15)
+
+        async def send_single_message(user):
+            async with semaphore:
+                if cancel_event.is_set():
+                    return False
+
+                telegram_id = getattr(user, "telegram_id", None)
+                if telegram_id is None:
+                    return False
+
+                try:
+                    await self._deliver_message(telegram_id, config, keyboard)
+                    return True
+                except Exception as exc:  # noqa: BLE001
+                    logger.error(
+                        "Ошибка отправки рассылки %s пользователю %s: %s",
+                        broadcast_id,
+                        telegram_id,
+                        exc,
+                    )
+                    return False
+
+        batch_size = 100
+        for i in range(0, len(recipients), batch_size):
+            if cancel_event.is_set():
+                await self._mark_cancelled(broadcast_id, sent_count, failed_count)
+                return sent_count, failed_count, True
+
+            batch = recipients[i:i + batch_size]
+            tasks = [send_single_message(user) for user in batch]
+            results = await asyncio.gather(*tasks, return_exceptions=True)
+
+            for result in results:
+                if result is True:
+                    sent_count += 1
+                else:
+                    failed_count += 1
+
+            processed = sent_count + failed_count
+            if processed % PROGRESS_UPDATE_STEP == 0:
+                await self._update_progress(broadcast_id, sent_count, failed_count)
+
+            await asyncio.sleep(0.1)
+
+        return sent_count, failed_count, False
+
     def _build_keyboard(self, selected_buttons: Optional[list[str]]) -> Optional[InlineKeyboardMarkup]:
         if selected_buttons is None:
             selected_buttons = []
@@ -251,18 +376,14 @@ class BroadcastService:
         *,
         cancelled: bool,
     ) -> None:
-        async with AsyncSessionLocal() as session:
-            broadcast = await session.get(BroadcastHistory, broadcast_id)
-            if not broadcast:
-                return
-
-            broadcast.sent_count = sent_count
-            broadcast.failed_count = failed_count
-            broadcast.status = "cancelled" if cancelled else (
+        await self._safe_status_update(
+            broadcast_id,
+            sent_count,
+            failed_count,
+            status="cancelled" if cancelled else (
                 "completed" if failed_count == 0 else "partial"
-            )
-            broadcast.completed_at = datetime.utcnow()
-            await session.commit()
+            ),
+        )
 
     async def _mark_cancelled(
         self,
@@ -283,16 +404,70 @@ class BroadcastService:
         sent_count: int = 0,
         failed_count: int = 0,
     ) -> None:
-        async with AsyncSessionLocal() as session:
-            broadcast = await session.get(BroadcastHistory, broadcast_id)
-            if not broadcast:
-                return
+        await self._safe_status_update(
+            broadcast_id,
+            sent_count,
+            failed_count,
+            status="failed",
+        )
 
-            broadcast.sent_count = sent_count
-            broadcast.failed_count = failed_count or broadcast.failed_count
-            broadcast.status = "failed"
-            broadcast.completed_at = datetime.utcnow()
-            await session.commit()
+    async def _update_progress(
+        self,
+        broadcast_id: int,
+        sent_count: int,
+        failed_count: int,
+    ) -> None:
+        """Периодически обновляет прогресс рассылки, чтобы держать соединение активным."""
+
+        await self._safe_status_update(
+            broadcast_id,
+            sent_count,
+            failed_count,
+            status="in_progress",
+            update_completed_at=False,
+        )
+
+    async def _safe_status_update(
+        self,
+        broadcast_id: int,
+        sent_count: int,
+        failed_count: int,
+        *,
+        status: str,
+        update_completed_at: bool = True,
+    ) -> None:
+        attempts = 0
+
+        while attempts < 2:
+            try:
+                async with AsyncSessionLocal() as session:
+                    broadcast = await session.get(BroadcastHistory, broadcast_id)
+                    if not broadcast:
+                        return
+
+                    broadcast.sent_count = sent_count
+                    broadcast.failed_count = failed_count
+                    broadcast.status = status
+
+                    if update_completed_at:
+                        broadcast.completed_at = datetime.utcnow()
+
+                    await session.commit()
+                    return
+            except InterfaceError as exc:
+                attempts += 1
+                logger.warning(
+                    "Проблемы с соединением при обновлении статуса рассылки %s: %s. Повтор %s/2",
+                    broadcast_id,
+                    exc,
+                    attempts,
+                )
+                await asyncio.sleep(0.2)
+            except SQLAlchemyError:
+                logger.exception(
+                    "Не удалось обновить статус рассылки %s", broadcast_id
+                )
+                return
 
 
 broadcast_service = BroadcastService()