From aa7877dc6448227a8eab83a9746f53cb0c2f4007 Mon Sep 17 00:00:00 2001
From: otsmr <git@tsmr.eu>
Date: Thu, 17 Jul 2025 20:22:05 +0200
Subject: [PATCH] fix type issue

---
 lib/src/model/json/message.dart | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/src/model/json/message.dart b/lib/src/model/json/message.dart
index 89cd875..deeea6c 100644
--- a/lib/src/model/json/message.dart
+++ b/lib/src/model/json/message.dart
@@ -243,7 +243,7 @@ class AckContent extends MessageContent {
 
   static AckContent fromJson(Map json) {
     return AckContent(
-      messageIdToAck: json['messageIdToAck'] as int,
+      messageIdToAck: json['messageIdToAck'] as int?,
       retransIdToAck: json['retransIdToAck'] as int,
     );
   }