diff --git a/sandbox/OpenIddict.Sandbox.AspNet.Client/Startup.cs b/sandbox/OpenIddict.Sandbox.AspNet.Client/Startup.cs
index 67fd740f..8cd8315c 100644
--- a/sandbox/OpenIddict.Sandbox.AspNet.Client/Startup.cs
+++ b/sandbox/OpenIddict.Sandbox.AspNet.Client/Startup.cs
@@ -104,6 +104,9 @@ public class Startup
         var builder = new ContainerBuilder();
         builder.Populate(services);
 
+        // Register the Entity Framework context.
+        builder.RegisterType<ApplicationDbContext>().AsSelf().InstancePerLifetimeScope();
+
         // Register the MVC controllers.
         builder.RegisterControllers(typeof(Startup).Assembly);
 
diff --git a/sandbox/OpenIddict.Sandbox.AspNet.Server/Startup.cs b/sandbox/OpenIddict.Sandbox.AspNet.Server/Startup.cs
index c1b2ea00..051a1d21 100644
--- a/sandbox/OpenIddict.Sandbox.AspNet.Server/Startup.cs
+++ b/sandbox/OpenIddict.Sandbox.AspNet.Server/Startup.cs
@@ -125,6 +125,9 @@ public class Startup
         var builder = new ContainerBuilder();
         builder.Populate(services);
 
+        // Register the Entity Framework context.
+        builder.RegisterType<ApplicationDbContext>().AsSelf().InstancePerLifetimeScope();
+
         // Register the MVC controllers.
         builder.RegisterControllers(typeof(Startup).Assembly);