diff --git a/EvoCalculator.Core/Controllers/v1/CalculationController.cs b/EvoCalculator.Core/Controllers/v1/CalculationController.cs
index ac8fb5b..9677d03 100644
--- a/EvoCalculator.Core/Controllers/v1/CalculationController.cs
+++ b/EvoCalculator.Core/Controllers/v1/CalculationController.cs
@@ -45,11 +45,19 @@ namespace EvoCalculator.Core.Controllers.V1
 
             if (errors != null && errors.Count > 0)
             {
-                return StatusCode(500, JsonConvert.SerializeObject(errors,
-                    new JsonSerializerSettings {Formatting = Formatting.Indented}));
+                return StatusCode(500, JsonConvert.SerializeObject(
+                    new
+                    {
+                        errors
+                    },
+                    new JsonSerializerSettings
+                    {
+                        Formatting = Formatting.Indented
+                    }));
             }
 
-            return Ok(JsonConvert.SerializeObject(res,
+            return Ok(JsonConvert.SerializeObject(
+                res,
                 new JsonSerializerSettings
                 {
                     Formatting = Formatting.Indented,