diff --git a/ExcelTool/App.config b/ExcelTool/App.config
deleted file mode 100644
index 00bfd11..0000000
--- a/ExcelTool/App.config
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="utf-8" ?>
-<configuration>
-    <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
-    </startup>
-</configuration>
\ No newline at end of file
diff --git a/ExcelTool/ExcelTool.csproj b/ExcelTool/ExcelTool.csproj
index 7e9ec26..2af7dd7 100644
--- a/ExcelTool/ExcelTool.csproj
+++ b/ExcelTool/ExcelTool.csproj
@@ -4,8 +4,7 @@
     <OutputType>Exe</OutputType>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
-    <PackageReference Include="NPOI.Excel" Version="2.1.1" />
+    <PackageReference Include="NPOI" Version="2.7.6" />
     <PackageReference Include="Spire.XLS" Version="12.7.1" />
     <PackageReference Include="System.Data.DataSetExtensions" Version="4.5.0" />
   </ItemGroup>