diff --git a/samples/MQTTnet.EventBus.AspNetCoreApi_Integration/MQTTnet.EventBus.AspNetCoreApi_Integration.csproj b/samples/MQTTnet.EventBus.AspNetCoreApi_Integration/MQTTnet.EventBus.AspNetCoreApi_Integration.csproj
index d59c6d2..572d038 100644
--- a/samples/MQTTnet.EventBus.AspNetCoreApi_Integration/MQTTnet.EventBus.AspNetCoreApi_Integration.csproj
+++ b/samples/MQTTnet.EventBus.AspNetCoreApi_Integration/MQTTnet.EventBus.AspNetCoreApi_Integration.csproj
@@ -10,4 +10,8 @@
     <PackageReference Include="Microsoft.AspNetCore.Razor.Design" Version="2.2.0" PrivateAssets="All" />
   </ItemGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\..\src\MQTTnet.EventBus\MQTTnet.EventBus.csproj" />
+  </ItemGroup>
+
 </Project>