diff --git a/src/Guestbooky/Guestbooky.API/Controllers/MessageController.cs b/src/Guestbooky/Guestbooky.API/Controllers/MessageController.cs
index 832d390..f9b1afa 100644
--- a/src/Guestbooky/Guestbooky.API/Controllers/MessageController.cs
+++ b/src/Guestbooky/Guestbooky.API/Controllers/MessageController.cs
@@ -23,7 +23,7 @@ public class MessageController : ControllerBase
     }
 
     [HttpPost]
-    [ProducesResponseType(StatusCodes.Status201Created)]
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
     [ProducesResponseType(typeof(ProblemDetails), StatusCodes.Status403Forbidden)]
     [ProducesResponseType(typeof(ProblemDetails), StatusCodes.Status500InternalServerError)]
     public async Task<IActionResult> Insert([FromBody] InsertMessageRequestDto message, CancellationToken token)
diff --git a/src/input-example/example.html b/src/input-example/example.html
index 69eced1..0f62e4d 100644
--- a/src/input-example/example.html
+++ b/src/input-example/example.html
@@ -141,13 +141,12 @@ document
       body: JSON.stringify(data),
     });
 
-    const result = await response.json();
-
-    if (response.ok) {
+    if (response.status >= 200 && response.status <= 299) {
       alert("Note added successfully!");
       this.reset(); // Clear the form fields
     } else {
-      alert(result.errorMessage);
+        const problem = await response.json();
+        alert(problem);
     }
   });
         </script>