diff --git a/RhSolutions.AddIn/Tools/WorksheetExtensions.cs b/RhSolutions.AddIn/Tools/WorksheetExtensions.cs
index 9d975d0..ee2fcdf 100644
--- a/RhSolutions.AddIn/Tools/WorksheetExtensions.cs
+++ b/RhSolutions.AddIn/Tools/WorksheetExtensions.cs
@@ -14,22 +14,32 @@ public static class WorksheetExtensions
 
     public static bool IsValidSource(this Worksheet worksheet)
     {
-        Range amountCell;
-        Range skuCell;
-        Range programLineCell;
-        Range nameCell;
-        Range measureCell;
+        Range headerRow;
 
-        Range[] cells = new[]
+        string[] fields = pricelistParameters.Values
+            .Where(v => v != "Прежний материал")
+            .ToArray();
+
+        var value = worksheet.Cells.Find(fields[0]);
+
+        if (value == null)
         {
-            amountCell = worksheet.Cells.Find(pricelistParameters["Amount"]),
-            skuCell = worksheet.Cells.Find(pricelistParameters["Sku"]),
-            programLineCell = worksheet.Cells.Find(pricelistParameters["ProductLine"]),
-            nameCell = worksheet.Cells.Find(pricelistParameters["Name"]),
-            measureCell = worksheet.Cells.Find(pricelistParameters["Measure"])
-        };
+            return false;
+        }
+        else
+        {
+            headerRow = value.EntireRow;
+        }
 
-        return cells.All(x => x != null);
+        for (int i = 1; i < fields.Length; i++)
+        {
+            if (headerRow.Find(fields[i]) == null)
+            {
+                return false;
+            }
+        }
+
+        return true;
     }
 
     public static void AddValue(this Range range, double value)