diff --git a/Directory.Build.props b/Directory.Build.props
index 56eea19..0c367ff 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -1,7 +1,7 @@
 <Project>
 
     <PropertyGroup>
-        <Version>0.4.0</Version>
+        <Version>0.4.1</Version>
         <Company>Code Happy, LLC</Company>
         <Authors>Code Happy, LLC</Authors>
         <Product>HTML/CSS To Image API</Product>
diff --git a/src/HtmlCssToImage/Models/Results/ErrorDetails.cs b/src/HtmlCssToImage/Models/Results/ErrorDetails.cs
index 68199c4..461cffe 100644
--- a/src/HtmlCssToImage/Models/Results/ErrorDetails.cs
+++ b/src/HtmlCssToImage/Models/Results/ErrorDetails.cs
@@ -23,6 +23,12 @@ public class ErrorDetails
     /// A list of validation errors that occurred during the request.
     /// </summary>
     [JsonPropertyName("validationErrors")]
-    public List<ValidationError> ValidationErrors { get; set; } = [];
+    public ValidationError[]? ValidationErrors { get; set; }
+
+    /// <summary>
+    /// A reference ID that can be used to track the error.
+    /// </summary>
+    [JsonPropertyName("referenceId")]
+    public string? ReferenceId { get; init; }
 
 }
\ No newline at end of file