diff --git a/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Export/Endpoint.cs b/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Export/Endpoint.cs
index 1c0baac30..d5deb003f 100644
--- a/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Export/Endpoint.cs
+++ b/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Export/Endpoint.cs
@@ -74,7 +74,7 @@ internal class Export : ElsaEndpoint<Request>
             foreach (var definition in definitions)
             {
                 var model = await CreateWorkflowModelAsync(definition, cancellationToken);
-                var binaryJson = SerializeWorkflowDefinition(model);
+                var binaryJson = await SerializeWorkflowDefinitionAsync(model, cancellationToken);
                 var fileName = GetFileName(model);
                 var entry = zipArchive.CreateEntry(fileName, CompressionLevel.Optimal);
                 await using var entryStream = entry.Open();
@@ -103,7 +103,7 @@ internal class Export : ElsaEndpoint<Request>
         }
 
         var model = await CreateWorkflowModelAsync(definition, cancellationToken);
-        var binaryJson = SerializeWorkflowDefinition(model);
+        var binaryJson = await SerializeWorkflowDefinitionAsync(model, cancellationToken);
         var fileName = GetFileName(model);
 
         await SendBytesAsync(binaryJson, fileName, cancellation: cancellationToken);
@@ -117,10 +117,25 @@ internal class Export : ElsaEndpoint<Request>
         return fileName;
     }
 
-    private byte[] SerializeWorkflowDefinition(WorkflowDefinitionModel model)
+    private async Task<byte[]> SerializeWorkflowDefinitionAsync(WorkflowDefinitionModel model, CancellationToken cancellationToken)
     {
-        JsonSerializerOptions serializerOptions = _serializer.GetOptions();
-        var binaryJson = JsonSerializer.SerializeToUtf8Bytes(model, serializerOptions);
+        var serializerOptions = _serializer.GetOptions();
+        var document = JsonSerializer.SerializeToDocument(model, serializerOptions);
+        var rootElement = document.RootElement;
+
+        using var output = new MemoryStream();
+        await using var writer = new Utf8JsonWriter(output);
+
+        writer.WriteStartObject();
+        writer.WriteString("$schema", "https://elsaworkflows.io/schemas/workflow-definition/v3.0.0/schema.json");
+
+        foreach (var property in rootElement.EnumerateObject())
+            property.WriteTo(writer);
+
+        writer.WriteEndObject();
+
+        await writer.FlushAsync(cancellationToken);
+        var binaryJson = output.ToArray();
         return binaryJson;
     }
 
diff --git a/src/modules/Elsa.Workflows.Core/Serialization/Configurators/AdditionalConvertersConfigurator.cs b/src/modules/Elsa.Workflows.Core/Serialization/Configurators/AdditionalConvertersConfigurator.cs
index 6a5404312..da96c7e30 100644
--- a/src/modules/Elsa.Workflows.Core/Serialization/Configurators/AdditionalConvertersConfigurator.cs
+++ b/src/modules/Elsa.Workflows.Core/Serialization/Configurators/AdditionalConvertersConfigurator.cs
@@ -1,6 +1,7 @@
 using System.Text.Json;
 using System.Text.Json.Serialization;
 using Elsa.Workflows.Serialization.Converters;
+using JetBrains.Annotations;
 using Microsoft.Extensions.DependencyInjection;
 
 namespace Elsa.Workflows.Serialization.Configurators;
@@ -8,23 +9,14 @@ namespace Elsa.Workflows.Serialization.Configurators;
 /// <summary>
 /// Add additional <see cref="JsonConverter"/> objects.
 /// </summary>
-public class AdditionalConvertersConfigurator : SerializationOptionsConfiguratorBase
+[UsedImplicitly]
+public class AdditionalConvertersConfigurator(IServiceProvider serviceProvider) : SerializationOptionsConfiguratorBase
 {
-    private readonly IServiceProvider _serviceProvider;
-
-    /// <summary>
-    /// Initializes a new instance of the <see cref="AdditionalConvertersConfigurator"/> class.
-    /// </summary>
-    public AdditionalConvertersConfigurator(IServiceProvider serviceProvider)
-    {
-        _serviceProvider = serviceProvider;
-    }
-
     /// <inheritdoc />
     public override void Configure(JsonSerializerOptions options)
     {
         options.Converters.Add(Create<VariableConverterFactory>());
     }
 
-    private T Create<T>() => ActivatorUtilities.CreateInstance<T>(_serviceProvider);
+    private T Create<T>() => ActivatorUtilities.CreateInstance<T>(serviceProvider);
 }
\ No newline at end of file