diff --git a/src/neo/SmartContract/Native/KeyBuilder.cs b/src/neo/SmartContract/KeyBuilder.cs
similarity index 98%
rename from src/neo/SmartContract/Native/KeyBuilder.cs
rename to src/neo/SmartContract/KeyBuilder.cs
index 0f5970b241..c725da370b 100644
--- a/src/neo/SmartContract/Native/KeyBuilder.cs
+++ b/src/neo/SmartContract/KeyBuilder.cs
@@ -3,7 +3,7 @@
 using System;
 using System.IO;
 
-namespace Neo.SmartContract.Native
+namespace Neo.SmartContract
 {
     public class KeyBuilder
     {
diff --git a/tests/neo.UnitTests/SmartContract/Native/UT_KeyBuilder.cs b/tests/neo.UnitTests/SmartContract/UT_KeyBuilder.cs
similarity index 93%
rename from tests/neo.UnitTests/SmartContract/Native/UT_KeyBuilder.cs
rename to tests/neo.UnitTests/SmartContract/UT_KeyBuilder.cs
index 9db398f0cb..39c2018f25 100644
--- a/tests/neo.UnitTests/SmartContract/Native/UT_KeyBuilder.cs
+++ b/tests/neo.UnitTests/SmartContract/UT_KeyBuilder.cs
@@ -1,7 +1,7 @@
 using Microsoft.VisualStudio.TestTools.UnitTesting;
-using Neo.SmartContract.Native;
+using Neo.SmartContract;
 
-namespace Neo.UnitTests.SmartContract.Native
+namespace Neo.UnitTests.SmartContract
 {
     [TestClass]
     public class UT_KeyBuilder