diff --git a/ByBit.Net/Objects/Models/V5/BybitOrderbook.cs b/ByBit.Net/Objects/Models/V5/BybitOrderbook.cs
index 6af35601..d3f275d7 100644
--- a/ByBit.Net/Objects/Models/V5/BybitOrderbook.cs
+++ b/ByBit.Net/Objects/Models/V5/BybitOrderbook.cs
@@ -36,7 +36,7 @@ public record BybitOrderbook
         /// Update id
         /// </summary>
         [JsonProperty("u")]
-        public int UpdateId { get; set; }
+        public long UpdateId { get; set; }
         /// <summary>
         /// Cross sequence
         /// </summary>