diff --git a/ExportDXF/ExportDXF.csproj b/ExportDXF/ExportDXF.csproj
index 22ab635..dd73269 100644
--- a/ExportDXF/ExportDXF.csproj
+++ b/ExportDXF/ExportDXF.csproj
@@ -60,9 +60,6 @@
     <SignManifests>false</SignManifests>
   </PropertyGroup>
   <ItemGroup>
-    <Reference Include="EPPlus, Version=4.5.1.0, Culture=neutral, PublicKeyToken=ea159fdaa78159a1, processorArchitecture=MSIL">
-      <HintPath>..\packages\EPPlus.4.5.1\lib\net40\EPPlus.dll</HintPath>
-    </Reference>
     <Reference Include="PresentationCore" />
     <Reference Include="SolidWorks.Interop.sldworks, Version=24.1.0.45, Culture=neutral, PublicKeyToken=7c4797c3e4eeac03, processorArchitecture=MSIL">
       <SpecificVersion>False</SpecificVersion>
@@ -113,7 +110,6 @@
       <DependentUpon>Resources.resx</DependentUpon>
       <DesignTime>True</DesignTime>
     </Compile>
-    <None Include="packages.config" />
     <None Include="Properties\Settings.settings">
       <Generator>SettingsSingleFileGenerator</Generator>
       <LastGenOutput>Settings.Designer.cs</LastGenOutput>
@@ -156,6 +152,11 @@
       <Install>true</Install>
     </BootstrapperPackage>
   </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="EPPlus">
+      <Version>4.5.3.1</Version>
+    </PackageReference>
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.
diff --git a/ExportDXF/Forms/MainForm.cs b/ExportDXF/Forms/MainForm.cs
index 91021d3..6cf5617 100644
--- a/ExportDXF/Forms/MainForm.cs
+++ b/ExportDXF/Forms/MainForm.cs
@@ -1,4 +1,5 @@
-using SolidWorks.Interop.sldworks;
+using OfficeOpenXml;
+using SolidWorks.Interop.sldworks;
 using SolidWorks.Interop.swconst;
 using System;
 using System.Collections.Generic;
diff --git a/ExportDXF/packages.config b/ExportDXF/packages.config
deleted file mode 100644
index f17543a..0000000
--- a/ExportDXF/packages.config
+++ /dev/null
@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<packages>
-  <package id="EPPlus" version="4.5.1" targetFramework="net40" />
-</packages>
\ No newline at end of file