diff --git a/framework/src/Volo.Abp.MultiTenancy/Volo/Abp/MultiTenancy/TenantConnectionStringUpdatedEto.cs b/framework/src/Volo.Abp.MultiTenancy/Volo/Abp/MultiTenancy/TenantConnectionStringUpdatedEto.cs
new file mode 100644
index 0000000000..022343821b
--- /dev/null
+++ b/framework/src/Volo.Abp.MultiTenancy/Volo/Abp/MultiTenancy/TenantConnectionStringUpdatedEto.cs
@@ -0,0 +1,21 @@
+using System;
+using Volo.Abp.Domain.Entities.Events.Distributed;
+using Volo.Abp.EventBus;
+
+namespace Volo.Abp.MultiTenancy
+{
+    [Serializable]
+    [EventName("abp.multi_tenancy.tenant.connection_string.updated")]
+    public class TenantConnectionStringUpdatedEto : EtoBase
+    {
+        public Guid Id { get; set; }
+
+        public string Name { get; set; }
+
+        public string ConnectionStringName { get; set; }
+
+        public string OldValue { get; set; }
+
+        public string NewValue { get; set; }
+    }
+}