diff --git a/WinFormsApp1/WinFormsApp1.csproj b/WinFormsApp1/WinFormsApp1.csproj
index b5e02da..6a6fff5 100644
--- a/WinFormsApp1/WinFormsApp1.csproj
+++ b/WinFormsApp1/WinFormsApp1.csproj
@@ -2,14 +2,12 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net9.0-windows</TargetFramework>
-    <Nullable>enable</Nullable>
+    <TargetFramework>net48</TargetFramework>
     <UseWindowsForms>true</UseWindowsForms>
-    <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="EPPlus" Version="7.5.2" />
+    <PackageReference Include="EPPlus" Version="4.5.3.3" />
   </ItemGroup>
 
 </Project>
\ No newline at end of file