diff --git a/neo/Plugins/IPersistencePlugin.cs b/neo/Plugins/IPersistencePlugin.cs
index 195298d8d9..cf4ee697fd 100644
--- a/neo/Plugins/IPersistencePlugin.cs
+++ b/neo/Plugins/IPersistencePlugin.cs
@@ -6,6 +6,6 @@ namespace Neo.Plugins
 {
     public interface IPersistencePlugin
     {
-        void OnPersist(Snapshot snapshot, List<ApplicationExecuted> applicationExecutedList);
+        void OnPersist(Snapshot snapshot, IReadOnlyList<ApplicationExecuted> applicationExecutedList);
     }
 }