diff --git a/ILSpy.AddIn.VS2022/ILSpy.AddIn.VS2022.csproj b/ILSpy.AddIn.VS2022/ILSpy.AddIn.VS2022.csproj
index 4beb695ac..211bff2a8 100644
--- a/ILSpy.AddIn.VS2022/ILSpy.AddIn.VS2022.csproj
+++ b/ILSpy.AddIn.VS2022/ILSpy.AddIn.VS2022.csproj
@@ -48,6 +48,13 @@
     <PackageReference Include="Mono.Cecil" Version="$(MonoCecilVersion)" />
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageReference Include="TunnelVisionLabs.ReferenceAssemblyAnnotator" Version="1.0.0-alpha.160" PrivateAssets="all" />
+
+    <!-- Specifies the version of Microsoft.NETCore.App.Ref to obtain nullability information from. -->
+    <PackageDownload Include="Microsoft.NETCore.App.Ref" Version="[6.0.0]" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\ILSpy\ILSpy.csproj">
       <ReferenceOutputAssembly>false</ReferenceOutputAssembly>
@@ -76,7 +83,6 @@
     <Compile Include="..\ICSharpCode.Decompiler\Metadata\LightJson\Serialization\TextScanner.cs" Link="Decompiler\LightJson\Serialization\TextScanner.cs" />
     <Compile Include="..\ICSharpCode.Decompiler\Metadata\UniversalAssemblyResolver.cs" Link="UniversalAssemblyResolver.cs" />
     <Compile Include="..\ICSharpCode.Decompiler\Util\EmptyList.cs" Link="Decompiler\EmptyList.cs" />
-    <Compile Include="..\ICSharpCode.Decompiler\Util\NullAttributes.cs" Link="NullAttributes.cs" />
     <Compile Include="..\ILSpy\NativeMethods.cs" Link="NativeMethods.cs" />
     <Compile Include="Decompiler\Dummy.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
diff --git a/ILSpy.AddIn/ILSpy.AddIn.csproj b/ILSpy.AddIn/ILSpy.AddIn.csproj
index 793bb28f3..a8e024a2c 100644
--- a/ILSpy.AddIn/ILSpy.AddIn.csproj
+++ b/ILSpy.AddIn/ILSpy.AddIn.csproj
@@ -54,6 +54,13 @@
     <PackageReference Include="Mono.Cecil" Version="$(MonoCecilVersion)" />
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageReference Include="TunnelVisionLabs.ReferenceAssemblyAnnotator" Version="1.0.0-alpha.160" PrivateAssets="all" />
+
+    <!-- Specifies the version of Microsoft.NETCore.App.Ref to obtain nullability information from. -->
+    <PackageDownload Include="Microsoft.NETCore.App.Ref" Version="[6.0.0]" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\ILSpy\ILSpy.csproj">
       <ReferenceOutputAssembly>false</ReferenceOutputAssembly>
@@ -82,7 +89,6 @@
     <Compile Include="..\ICSharpCode.Decompiler\Metadata\LightJson\Serialization\TextScanner.cs" Link="Decompiler\LightJson\Serialization\TextScanner.cs" />
     <Compile Include="..\ICSharpCode.Decompiler\Metadata\UniversalAssemblyResolver.cs" Link="UniversalAssemblyResolver.cs" />
     <Compile Include="..\ICSharpCode.Decompiler\Util\EmptyList.cs" Link="Decompiler\EmptyList.cs" />
-    <Compile Include="..\ICSharpCode.Decompiler\Util\NullAttributes.cs" Link="NullAttributes.cs" />
     <Compile Include="..\ILSpy\NativeMethods.cs" Link="NativeMethods.cs" />
     <Compile Include="Decompiler\Dummy.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />