diff --git a/ArrayToExcel/ArrayToExcel.csproj b/ArrayToExcel/ArrayToExcel.csproj
index 09529e6..903537e 100644
--- a/ArrayToExcel/ArrayToExcel.csproj
+++ b/ArrayToExcel/ArrayToExcel.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net45;netstandard2.0;netstandard2.1</TargetFrameworks>
+    <TargetFrameworks>net45;netstandard2.0</TargetFrameworks>
 	<LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>
     <SignAssembly>True</SignAssembly>