diff --git a/src/JWT/JWT.csproj b/src/JWT/JWT.csproj
index bc3413314..5e8ffa873 100644
--- a/src/JWT/JWT.csproj
+++ b/src/JWT/JWT.csproj
@@ -41,10 +41,13 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Condition="$(DefineConstants.Contains(MODERN_DOTNET))" Include="System.Text.Json" Version="6.0.7" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
   </ItemGroup>
 
+  <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
+    <PackageReference Include="System.Text.Json" Version="6.0.7" />
+  </ItemGroup>
+
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard1.3' OR '$(TargetFramework)' == 'netstandard2.0'">
     <PackageReference Include="System.ComponentModel.Primitives" Version="4.3.0" />
     <PackageReference Include="System.Reflection.TypeExtensions" Version="4.7.0" />