3 files changed, 3 insertions, 3 deletions

diff --git a/src/WixToolset.Core/Extensibility/HeatExtension.cs b/src/WixToolset.Core/Extensibility/HeatExtension.cs
index 48e1a93b..2b4a6823 100644
--- a/src/WixToolset.Core/Extensibility/HeatExtension.cs
+++ b/src/WixToolset.Core/Extensibility/HeatExtension.cs
@@ -1,6 +1,6 @@
 // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
 
-namespace WixToolset.Extensibility
+namespace WixToolset.Core.Extensibility
 {
     using System;
     using System.IO;
diff --git a/src/WixToolset.Core/Extensibility/IHeatCore.cs b/src/WixToolset.Core/Extensibility/IHeatCore.cs
index dbfc8929..031c8132 100644
--- a/src/WixToolset.Core/Extensibility/IHeatCore.cs
+++ b/src/WixToolset.Core/Extensibility/IHeatCore.cs
@@ -1,6 +1,6 @@
 // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
 
-namespace WixToolset.Extensibility
+namespace WixToolset.Core.Extensibility
 {
     using WixToolset.Data;
 
diff --git a/src/WixToolset.Core/Extensibility/MutatorExtension.cs b/src/WixToolset.Core/Extensibility/MutatorExtension.cs
index 9de64180..f95b5b11 100644
--- a/src/WixToolset.Core/Extensibility/MutatorExtension.cs
+++ b/src/WixToolset.Core/Extensibility/MutatorExtension.cs
@@ -1,6 +1,6 @@
 // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
 
-namespace WixToolset.Extensibility
+namespace WixToolset.Core.Extensibility
 {
     using System;
     using System.Collections.Generic;