diff --git a/src/neo/SmartContract/Enumerators/IEnumerator.cs b/src/neo/SmartContract/Enumerators/IEnumerator.cs
index 948bad9371..77da74bd43 100644
--- a/src/neo/SmartContract/Enumerators/IEnumerator.cs
+++ b/src/neo/SmartContract/Enumerators/IEnumerator.cs
@@ -3,7 +3,7 @@
 
 namespace Neo.SmartContract.Enumerators
 {
-    internal interface IEnumerator : IDisposable
+    public interface IEnumerator : IDisposable
     {
         bool Next();
         StackItem Value();
diff --git a/src/neo/SmartContract/Iterators/IIterator.cs b/src/neo/SmartContract/Iterators/IIterator.cs
index 66b3ef3bc6..c5c866891a 100644
--- a/src/neo/SmartContract/Iterators/IIterator.cs
+++ b/src/neo/SmartContract/Iterators/IIterator.cs
@@ -3,7 +3,7 @@
 
 namespace Neo.SmartContract.Iterators
 {
-    internal interface IIterator : IEnumerator
+    public interface IIterator : IEnumerator
     {
         PrimitiveType Key();
     }