diff --git a/framework/src/Volo.Abp.EventBus/Volo/Abp/EventBus/EventBusBase.cs b/framework/src/Volo.Abp.EventBus/Volo/Abp/EventBus/EventBusBase.cs
index ef5c5cdabc..151a149281 100644
--- a/framework/src/Volo.Abp.EventBus/Volo/Abp/EventBus/EventBusBase.cs
+++ b/framework/src/Volo.Abp.EventBus/Volo/Abp/EventBus/EventBusBase.cs
@@ -135,9 +135,9 @@ public abstract class EventBusBase : IEventBus
     {
         await new SynchronizationContextRemover();
 
-        foreach (var handlerFactories in GetHandlerFactories(eventType))
+        foreach (var handlerFactories in GetHandlerFactories(eventType).ToList())
         {
-            foreach (var handlerFactory in handlerFactories.EventHandlerFactories)
+            foreach (var handlerFactory in handlerFactories.EventHandlerFactories.ToList())
             {
                 await TriggerHandlerAsync(handlerFactory, handlerFactories.EventType, eventData, exceptions, inboxConfig);
             }