diff --git a/src/IronHook.Core/IronHook.Core.csproj b/src/IronHook.Core/IronHook.Core.csproj
index f208d30..6b72021 100644
--- a/src/IronHook.Core/IronHook.Core.csproj
+++ b/src/IronHook.Core/IronHook.Core.csproj
@@ -4,4 +4,8 @@
     <TargetFramework>net5.0</TargetFramework>
   </PropertyGroup>
 
+  <ItemGroup>
+    <Folder Include="Concrete\" />
+  </ItemGroup>
+
 </Project>