diff --git a/src/Nocr.TelegramListener.AppServices/UpdateListeners/UpdateListenerBackgroundService.cs b/src/Nocr.TelegramListener.AppServices/UpdateListeners/UpdateListenerBackgroundService.cs
index 8a22c16..dc01f2d 100644
--- a/src/Nocr.TelegramListener.AppServices/UpdateListeners/UpdateListenerBackgroundService.cs
+++ b/src/Nocr.TelegramListener.AppServices/UpdateListeners/UpdateListenerBackgroundService.cs
@@ -37,7 +37,7 @@ public sealed class UpdateListenerBackgroundService : BackgroundService
         Client? client = null;
         while (!stoppingToken.IsCancellationRequested)
         {
-            if (DateTimeOffset.UtcNow - TimeSpan.FromHours(2) < _activityStartTime)
+            if (DateTimeOffset.UtcNow - TimeSpan.FromHours(2) > _activityStartTime)
             {
                 _logger.LogInformation("Timeout exceed.");
                 _activityStartTime = DateTimeOffset.UtcNow;