security: Cleaning up all security stuff...
diff --git a/src/sync-state.proto b/src/sync-state.proto
index 18892fb..7cc6b18 100644
--- a/src/sync-state.proto
+++ b/src/sync-state.proto
@@ -12,8 +12,8 @@
   required ActionType type = 2;
   message SeqNo
   {
-    required uint32 seq = 1;
-    required uint32 session = 2;
+    required uint64 seq = 1;
+    required uint64 session = 2;
   }
   optional SeqNo seqno = 3;
 }