diff --git a/src/IF.Lastfm.Core/Api/Commands/TrackApi/TrackUpdateNowPlayingCommand.cs b/src/IF.Lastfm.Core/Api/Commands/TrackApi/TrackUpdateNowPlayingCommand.cs
index c5ac461..65c42bf 100644
--- a/src/IF.Lastfm.Core/Api/Commands/TrackApi/TrackUpdateNowPlayingCommand.cs
+++ b/src/IF.Lastfm.Core/Api/Commands/TrackApi/TrackUpdateNowPlayingCommand.cs
@@ -47,7 +47,7 @@ public override void SetParameters()
 
             if (Duration.HasValue)
             {
-                Parameters.Add("duration", Duration.Value.TotalSeconds.ToString());
+                Parameters.Add("duration",Math.Round(Duration.Value.TotalSeconds).ToString());
             }
         }