diff --git a/DeviceDependentGenerator/DeviceDependentGenerator.cs b/DeviceDependentGenerator/DeviceDependentGenerator.cs
index 8a2f533..d2f4222 100644
--- a/DeviceDependentGenerator/DeviceDependentGenerator.cs
+++ b/DeviceDependentGenerator/DeviceDependentGenerator.cs
@@ -163,7 +163,9 @@ public sealed class DeviceDependentGenerator : IIncrementalGenerator
 
             string generatedFileName = baseName + "." + enumValueName + ".generated.cs";
             string hintName = options.BuildHintName(filePath, generatedFileName);
-            context.AddSource(hintName, SourceText.From(generatedRoot.ToFullString(), Encoding.UTF8));
+            context.AddSource(
+                hintName,
+                SourceText.From("// <auto-generated/>\n#nullable enable\n" + generatedRoot.ToFullString(), Encoding.UTF8));
         }
     }
 
diff --git a/DeviceDependentGenerator/DeviceDependentGenerator.csproj b/DeviceDependentGenerator/DeviceDependentGenerator.csproj
index a002c94..f4fb1e6 100644
--- a/DeviceDependentGenerator/DeviceDependentGenerator.csproj
+++ b/DeviceDependentGenerator/DeviceDependentGenerator.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.0</TargetFramework>
+    <TargetFrameworks>netstandard2.0;net8.0</TargetFrameworks>
     <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>
     <ImplicitUsings>disable</ImplicitUsings>