diff --git a/MoreLinq/MoreLinq.csproj b/MoreLinq/MoreLinq.csproj
index 286c8112b..31c10ac3a 100644
--- a/MoreLinq/MoreLinq.csproj
+++ b/MoreLinq/MoreLinq.csproj
@@ -246,4 +246,11 @@
     <Folder Include="Properties\" />
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Nullable" Version="1.1.1">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
+
 </Project>