diff --git a/web-app-aspnet/WebApp.csproj b/web-app-aspnet/WebApp.csproj
index 511c33e..1f8f526 100644
--- a/web-app-aspnet/WebApp.csproj
+++ b/web-app-aspnet/WebApp.csproj
@@ -11,7 +11,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.Identity.Web" Version="2.*" />
     <PackageReference Include="Microsoft.Identity.Web.UI" Version="2.*" />
-    <PackageReference Include="Microsoft.Identity.Web.DownstreamApi" Version="2.18.1" />
+    <PackageReference Include="Microsoft.Identity.Web.DownstreamApi" Version="4.0.0" />
   </ItemGroup>
 
 </Project>