diff --git a/src/MaksIT.Results/MaksIT.Results.csproj b/src/MaksIT.Results/MaksIT.Results.csproj
index 2722e1a..555ac63 100644
--- a/src/MaksIT.Results/MaksIT.Results.csproj
+++ b/src/MaksIT.Results/MaksIT.Results.csproj
@@ -8,7 +8,7 @@
 
     <!-- NuGet package metadata -->
     <PackageId>MaksIT.Results</PackageId>
-    <Version>1.1.0</Version>
+    <Version>1.1.1</Version>
     <Authors>Maksym Sadovnychyy</Authors>
     <Company>MAKS-IT</Company>
     <Product>MaksIT.Results</Product>
diff --git a/src/MaksIT.Results/Mvc/ObjectResult.cs b/src/MaksIT.Results/Mvc/ObjectResult.cs
index fc0c739..f320eaf 100644
--- a/src/MaksIT.Results/Mvc/ObjectResult.cs
+++ b/src/MaksIT.Results/Mvc/ObjectResult.cs
@@ -1,8 +1,6 @@
 using System.Text.Json;
-using System.Text.Json.Serialization;
 using Microsoft.AspNetCore.Mvc;
 
-
 namespace MaksIT.Results.Mvc;
 
 public class ObjectResult(object? value) : IActionResult {
@@ -20,7 +18,13 @@ public class ObjectResult(object? value) : IActionResult {
       response.StatusCode = StatusCode.Value;
     }
 
-    response.ContentType = "application/json";
+    // Set content type based on value type
+    if (Value is ProblemDetails) {
+      response.ContentType = "application/problem+json";
+    }
+    else {
+      response.ContentType = "application/json";
+    }
 
     if (Value is not null) {
       await JsonSerializer.SerializeAsync(
diff --git a/src/MaksIT.Results/Mvc/ProblemDetails.cs b/src/MaksIT.Results/Mvc/ProblemDetails.cs
index b90a11f..b6bf09d 100644
--- a/src/MaksIT.Results/Mvc/ProblemDetails.cs
+++ b/src/MaksIT.Results/Mvc/ProblemDetails.cs
@@ -1,15 +1,11 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
+namespace MaksIT.Results.Mvc;
 
-namespace MaksIT.Results.Mvc;
 
 public class ProblemDetails {
-  public int? Status { get; set; }
+  public string? Type { get; set; }
   public string? Title { get; set; }
+  public int? Status { get; set; }
   public string? Detail { get; set; }
   public string? Instance { get; set; }
-  public IDictionary<string, object?> Extensions { get; } = new Dictionary<string, object?>();
+  public IDictionary<string, object?> Extensions { get; set; } = new Dictionary<string, object?>();
 }
\ No newline at end of file