diff --git a/ShareBook/ShareBook.Api/Middleware/ExceptionHandlerMiddleware.cs b/ShareBook/ShareBook.Api/Middleware/ExceptionHandlerMiddleware.cs
index edbd5f41..d845ccea 100644
--- a/ShareBook/ShareBook.Api/Middleware/ExceptionHandlerMiddleware.cs
+++ b/ShareBook/ShareBook.Api/Middleware/ExceptionHandlerMiddleware.cs
@@ -3,6 +3,7 @@
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Http;
 using Newtonsoft.Json;
+using Newtonsoft.Json.Serialization;
 using Rollbar;
 using ShareBook.Api.Services;
 using ShareBook.Domain.Common;
@@ -29,7 +30,7 @@ public async Task Invoke(HttpContext httpContext)
             {
                 var result = new Result();
                 result.Messages.Add(ex.Message);
-                var jsonResponse = JsonConvert.SerializeObject(result);
+                var jsonResponse = ToJson(result);
 
                 httpContext.Response.Clear();
                 httpContext.Response.StatusCode = (int)ex.ErrorType;
@@ -50,7 +51,7 @@ public async Task Invoke(HttpContext httpContext)
                 if (ex is AggregateException)
                     result.Messages.Add(ex.InnerException.ToString());
 
-                var jsonResponse = JsonConvert.SerializeObject(result);
+                var jsonResponse = ToJson(result);
 
                 httpContext.Response.Clear();
                 httpContext.Response.StatusCode = StatusCodes.Status500InternalServerError;
@@ -59,6 +60,22 @@ public async Task Invoke(HttpContext httpContext)
             }
         }
 
+        private string ToJson(Object obj)
+        {
+            DefaultContractResolver contractResolver = new DefaultContractResolver
+            {
+                NamingStrategy = new CamelCaseNamingStrategy()
+            };
+
+            string json = JsonConvert.SerializeObject(obj, new JsonSerializerSettings
+            {
+                ContractResolver = contractResolver,
+                Formatting = Formatting.Indented
+            });
+
+            return json;
+        }
+
         private void SendErrorToRollbar(Exception ex)
         {
             object error = new