diff --git a/RhSolutions.AddIn/Controllers/RibbonController.cs b/RhSolutions.AddIn/Controllers/RibbonController.cs
index 880d49f..302c6f6 100644
--- a/RhSolutions.AddIn/Controllers/RibbonController.cs
+++ b/RhSolutions.AddIn/Controllers/RibbonController.cs
@@ -93,7 +93,7 @@ public class RibbonController : ExcelRibbon
         else
         {
             Worksheet worksheet = RhSolutionsAddIn.Excel.ActiveWorkbook.ActiveSheet;
-            return worksheet.IsRehauSource();
+            return worksheet.IsValidSource();
         }
     }
 
diff --git a/RhSolutions.AddIn/Services/RhExcelReader.cs b/RhSolutions.AddIn/Services/RhExcelReader.cs
index 0749482..2395940 100644
--- a/RhSolutions.AddIn/Services/RhExcelReader.cs
+++ b/RhSolutions.AddIn/Services/RhExcelReader.cs
@@ -83,7 +83,7 @@ public class RhExcelReader : IExcelReader, IDisposable
         List<(string, Dictionary<Product, double>)> result = new();
         foreach (Worksheet worksheet in worksheets)
         {
-            if (!worksheet.IsRehauSource())
+            if (!worksheet.IsValidSource())
             {
                 continue;
             }
diff --git a/RhSolutions.AddIn/Services/RhExcelWriter.cs b/RhSolutions.AddIn/Services/RhExcelWriter.cs
index 6fd43fc..1af78a3 100644
--- a/RhSolutions.AddIn/Services/RhExcelWriter.cs
+++ b/RhSolutions.AddIn/Services/RhExcelWriter.cs
@@ -42,7 +42,7 @@ public class RhExcelWriter : IExcelWriter, IDisposable
     {
         _worksheet = OpenNewPrice();
 
-        if (!_worksheet.IsRehauSource())
+        if (!_worksheet.IsValidSource())
         {
             _application.ActiveWorkbook.Close();
             throw new ArgumentException(
diff --git a/RhSolutions.AddIn/Services/WorksheetExtensions.cs b/RhSolutions.AddIn/Services/WorksheetExtensions.cs
index 409cd5f..335c54d 100644
--- a/RhSolutions.AddIn/Services/WorksheetExtensions.cs
+++ b/RhSolutions.AddIn/Services/WorksheetExtensions.cs
@@ -9,14 +9,14 @@ namespace RhSolutions.Services;
 #endif
 public static class WorksheetExtensions
 {
-    public static bool IsRehauSource(this Worksheet worksheet)
+    public static bool IsValidSource(this Worksheet worksheet)
     {
         Range amountCell;
         Range skuCell;
         Range programLineCell;
         Range nameCell;
 
-        var pricelistParameters = RhSolutionsAddIn.Configuration.GetPriceListHeaders();  
+        var pricelistParameters = RhSolutionsAddIn.Configuration.GetPriceListHeaders();
 
         Range[] cells = new[]
         {