diff --git a/TLSharp.Core/Network/MtProtoSender.cs b/TLSharp.Core/Network/MtProtoSender.cs
index 5cbc9cf..d57b0b5 100644
--- a/TLSharp.Core/Network/MtProtoSender.cs
+++ b/TLSharp.Core/Network/MtProtoSender.cs
@@ -35,7 +35,11 @@ namespace TLSharp.Core.Network
         private int GenerateSequence(bool confirmed)
         {
             lock (session.Lock) {
-                return confirmed ? session.Sequence++ * 2 + 1 : session.Sequence * 2;
+                try {
+                    return confirmed ? session.Sequence++ * 2 + 1 : session.Sequence * 2;
+                } finally {
+                    session.Save ();
+                }
             }
         }