diff --git a/src/PriceListTools/AbstractTool.cs b/src/PriceListTools/AbstractTool.cs
index af60d0d..c43d06c 100644
--- a/src/PriceListTools/AbstractTool.cs
+++ b/src/PriceListTools/AbstractTool.cs
@@ -1,17 +1,15 @@
-using ExcelDna.Integration;
-using Microsoft.Office.Interop.Excel;
+using Microsoft.Office.Interop.Excel;
 using RehauSku.Interface;
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using Application = Microsoft.Office.Interop.Excel.Application;
 using ProgressBar = RehauSku.Interface.ProgressBar;
 
 namespace RehauSku.PriceListTools
 {
     internal abstract class AbstractTool
     {
-        protected Application ExcelApp = (Application)ExcelDnaUtil.Application;
+        protected Application ExcelApp = AddIn.Excel;
         protected TargetPriceList TargetFile { get; set; }
         protected ResultBar ResultBar { get; set; }
         protected ProgressBar ProgressBar { get; set; }
diff --git a/src/PriceListTools/ConvertTool.cs b/src/PriceListTools/ConvertTool.cs
index fc5850f..abf7e39 100644
--- a/src/PriceListTools/ConvertTool.cs
+++ b/src/PriceListTools/ConvertTool.cs
@@ -1,5 +1,4 @@
 using RehauSku.Interface;
-using System;
 
 namespace RehauSku.PriceListTools
 {