diff --git a/samples/IronHook.Web/Context/SampleDbContext.cs b/samples/IronHook.Web/Context/SampleDbContext.cs
index 4115ec9..1da896a 100644
--- a/samples/IronHook.Web/Context/SampleDbContext.cs
+++ b/samples/IronHook.Web/Context/SampleDbContext.cs
@@ -45,8 +45,8 @@ protected override void OnModelCreating(ModelBuilder modelBuilder)
 
                 entity
                     .Property(p => p.UpdateDate)
-                    .HasValueGenerator<GuidGenerator>()
-                    .ValueGeneratedOnAddOrUpdate();
+                    .HasValueGenerator<DateTimeValueGenerator>()
+                    .ValueGeneratedOnAdd();
             });
         }