diff --git a/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Post/Endpoint.cs b/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Post/Endpoint.cs
index de8f194e4..2a7419087 100644
--- a/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Post/Endpoint.cs
+++ b/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Post/Endpoint.cs
@@ -10,7 +10,9 @@ using JetBrains.Annotations;
 using Medallion.Threading;
 using System.Text.Json;
 using Elsa.Workflows.Api.Mappers;
+using Elsa.Workflows.Core.Serialization.Converters;
 using Elsa.Workflows.Management.Contracts;
+using Microsoft.AspNetCore.Http;
 
 namespace Elsa.Workflows.Api.Endpoints.WorkflowDefinitions.Post;
 
@@ -46,7 +48,7 @@ internal class Post : ElsaEndpoint<WorkflowDefinitionRequest, WorkflowDefinition
         var resourceName = $"{GetType().FullName}:{(!string.IsNullOrWhiteSpace(definitionId) ? definitionId : Guid.NewGuid().ToString())}";
 
         await using var handle = await _distributedLockProvider.AcquireLockAsync(resourceName, TimeSpan.FromMinutes(1), cancellationToken);
-        
+
         var draft = !string.IsNullOrWhiteSpace(definitionId)
             ? await _workflowDefinitionPublisher.GetDraftAsync(definitionId, VersionOptions.Latest, cancellationToken)
             : default;
@@ -89,6 +91,12 @@ internal class Post : ElsaEndpoint<WorkflowDefinitionRequest, WorkflowDefinition
         if (isNew)
             await SendCreatedAtAsync<Get.Get>(new { definitionId }, response, cancellation: cancellationToken);
         else
-            await SendOkAsync(response, cancellationToken);
+        {
+            // We do not want to include composite root activities in the response.
+            var apiSerializerOptions = _serializerOptionsProvider.CreateApiOptions();
+            apiSerializerOptions.Converters.Add(new JsonIgnoreCompositeRootConverterFactory());
+
+            await HttpContext.Response.WriteAsJsonAsync(response, serializerOptions, cancellationToken);
+        }
     }
 }
\ No newline at end of file
diff --git a/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Publish/Endpoint.cs b/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Publish/Endpoint.cs
index e508b4e2c..5ec4e944f 100644
--- a/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Publish/Endpoint.cs
+++ b/src/modules/Elsa.Workflows.Api/Endpoints/WorkflowDefinitions/Publish/Endpoint.cs
@@ -2,19 +2,26 @@ using Elsa.Abstractions;
 using Elsa.Common.Models;
 using Elsa.Workflows.Api.Mappers;
 using Elsa.Workflows.Api.Models;
+using Elsa.Workflows.Core.Serialization;
+using Elsa.Workflows.Core.Serialization.Converters;
 using Elsa.Workflows.Management.Contracts;
+using JetBrains.Annotations;
+using Microsoft.AspNetCore.Http;
 
 namespace Elsa.Workflows.Api.Endpoints.WorkflowDefinitions.Publish;
 
+[PublicAPI]
 internal class Publish : ElsaEndpoint<Request, WorkflowDefinitionResponse, WorkflowDefinitionMapper>
 {
     private readonly IWorkflowDefinitionStore _store;
     private readonly IWorkflowDefinitionPublisher _workflowDefinitionPublisher;
+    private readonly SerializerOptionsProvider _serializerOptionsProvider;
 
-    public Publish(IWorkflowDefinitionStore store, IWorkflowDefinitionPublisher workflowDefinitionPublisher)
+    public Publish(IWorkflowDefinitionStore store, IWorkflowDefinitionPublisher workflowDefinitionPublisher, SerializerOptionsProvider serializerOptionsProvider)
     {
         _store = store;
         _workflowDefinitionPublisher = workflowDefinitionPublisher;
+        _serializerOptionsProvider = serializerOptionsProvider;
     }
 
     public override void Configure()
@@ -30,7 +37,7 @@ internal class Publish : ElsaEndpoint<Request, WorkflowDefinitionResponse, Workf
             DefinitionId = request.DefinitionId,
             VersionOptions = VersionOptions.Latest
         };
-        
+
         var definition = await _store.FindAsync(filter, cancellationToken);
 
         if (definition == null)
@@ -49,6 +56,11 @@ internal class Publish : ElsaEndpoint<Request, WorkflowDefinitionResponse, Workf
         await _workflowDefinitionPublisher.PublishAsync(definition, cancellationToken);
 
         var response = await Map.FromEntityAsync(definition, cancellationToken);
-        await SendOkAsync(response, cancellationToken);
+
+        // We do not want to include composite root activities in the response.
+        var serializerOptions = _serializerOptionsProvider.CreateApiOptions();
+        serializerOptions.Converters.Add(new JsonIgnoreCompositeRootConverterFactory());
+
+        await HttpContext.Response.WriteAsJsonAsync(response, serializerOptions, cancellationToken);
     }
 }
\ No newline at end of file