diff --git a/src/WeihanLi.Common/Event/EventProperties.cs b/src/WeihanLi.Common/Event/EventProperties.cs
index 4c36de44..1648e309 100644
--- a/src/WeihanLi.Common/Event/EventProperties.cs
+++ b/src/WeihanLi.Common/Event/EventProperties.cs
@@ -8,4 +8,5 @@ public sealed class EventProperties: Dictionary<string, object?>, IEventBase
     public DateTimeOffset EventAt { get; set; }
     public string EventId { get; set; } = Guid.NewGuid().ToString();
     public string? TraceId { get; set; }
+    public string? EventSource { get; set; }
 }