diff --git a/src/neo/SmartContract/Iterators/StorageIterator.cs b/src/neo/SmartContract/Iterators/StorageIterator.cs
index 39f7e88cef..a42875e1aa 100644
--- a/src/neo/SmartContract/Iterators/StorageIterator.cs
+++ b/src/neo/SmartContract/Iterators/StorageIterator.cs
@@ -4,7 +4,7 @@
 
 namespace Neo.SmartContract.Iterators
 {
-    public class StorageIterator : IIterator
+    internal class StorageIterator : IIterator
     {
         private readonly IEnumerator<(StorageKey Key, StorageItem Value)> enumerator;