diff --git a/RhSolutions.AddIn/Controllers/RibbonController.cs b/RhSolutions.AddIn/Controllers/RibbonController.cs
index 302c6f6..0e82060 100644
--- a/RhSolutions.AddIn/Controllers/RibbonController.cs
+++ b/RhSolutions.AddIn/Controllers/RibbonController.cs
@@ -1,5 +1,4 @@
 using ExcelDna.Integration.CustomUI;
-using RhSolutions.Tools;
 using System.Reflection;
 using System.Runtime.InteropServices;
 #if! NET472
diff --git a/RhSolutions.AddIn/Services/RhExcelReader.cs b/RhSolutions.AddIn/Services/RhExcelReader.cs
index 2395940..e7ae342 100644
--- a/RhSolutions.AddIn/Services/RhExcelReader.cs
+++ b/RhSolutions.AddIn/Services/RhExcelReader.cs
@@ -1,5 +1,4 @@
 using System.IO;
-using RhSolutions.Tools;
 #if !NET472
 using System.Runtime.Versioning;
 using RhSolutions.Tools;
diff --git a/RhSolutions.AddIn/Services/RhExcelWriter.cs b/RhSolutions.AddIn/Services/RhExcelWriter.cs
index 1af78a3..51d66c6 100644
--- a/RhSolutions.AddIn/Services/RhExcelWriter.cs
+++ b/RhSolutions.AddIn/Services/RhExcelWriter.cs
@@ -3,7 +3,6 @@ using System.Runtime.Versioning;
 using RhSolutions.Tools;
 #endif
 
-using RhSolutions.Tools;
 
 namespace RhSolutions.Services;
 
diff --git a/RhSolutions.AddIn/Services/WorksheetExtensions.cs b/RhSolutions.AddIn/Tools/WorksheetExtensions.cs
similarity index 91%
rename from RhSolutions.AddIn/Services/WorksheetExtensions.cs
rename to RhSolutions.AddIn/Tools/WorksheetExtensions.cs
index 335c54d..0d4f9f3 100644
--- a/RhSolutions.AddIn/Services/WorksheetExtensions.cs
+++ b/RhSolutions.AddIn/Tools/WorksheetExtensions.cs
@@ -1,8 +1,11 @@
 #if !NET472
 using System.Runtime.Versioning;
+using RhSolutions;
+using RhSolutions.Services;
+using RhSolutions.Tools;
 #endif
 
-namespace RhSolutions.Services;
+namespace RhSolutions.Tools;
 
 #if !NET472
 [SupportedOSPlatform("windows")]