diff --git a/src/clients/Elsa.Api.Client/Extensions/DependencyInjectionExtensions.cs b/src/clients/Elsa.Api.Client/Extensions/DependencyInjectionExtensions.cs
index a5a14c777..fe88c1fce 100644
--- a/src/clients/Elsa.Api.Client/Extensions/DependencyInjectionExtensions.cs
+++ b/src/clients/Elsa.Api.Client/Extensions/DependencyInjectionExtensions.cs
@@ -82,19 +82,19 @@ public static class DependencyInjectionExtensions
     
     private static RefitSettings CreateRefitSettings(IServiceProvider serviceProvider)
     {
-        JsonSerializerOptions jsonSerializerSettings = new()
+        JsonSerializerOptions serializerOptions = new()
         {
             PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
         };
         
-        jsonSerializerSettings.Converters.Add(new JsonStringEnumConverter());
-        jsonSerializerSettings.Converters.Add(new VersionOptionsJsonConverter());
-        jsonSerializerSettings.Converters.Add(new ActivityJsonConverterFactory(serviceProvider));
-        jsonSerializerSettings.Converters.Add(new ExpressionJsonConverterFactory());
+        serializerOptions.Converters.Add(new JsonStringEnumConverter());
+        serializerOptions.Converters.Add(new VersionOptionsJsonConverter());
+        serializerOptions.Converters.Add(new ActivityJsonConverterFactory(serviceProvider));
+        serializerOptions.Converters.Add(new ExpressionJsonConverterFactory());
         
         var settings = new RefitSettings
         {
-            ContentSerializer = new SystemTextJsonContentSerializer(jsonSerializerSettings)
+            ContentSerializer = new SystemTextJsonContentSerializer(serializerOptions)
         };    
             
         return settings;
diff --git a/src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Contracts/IWorkflowDefinitionsApi.cs b/src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Contracts/IWorkflowDefinitionsApi.cs
index 227ce2e78..5fc8e2e70 100644
--- a/src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Contracts/IWorkflowDefinitionsApi.cs
+++ b/src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Contracts/IWorkflowDefinitionsApi.cs
@@ -1,3 +1,4 @@
+using System.Net.Mime;
 using Elsa.Api.Client.Models;
 using Elsa.Api.Client.Resources.WorkflowDefinitions.Models;
 using JetBrains.Annotations;
@@ -69,14 +70,16 @@ public interface IWorkflowDefinitionsApi
     /// <param name="cancellationToken">The cancellation token.</param>
     [Post("/workflow-definitions/{definitionId}/publish")]
     Task<WorkflowDefinition> PublishAsync(string definitionId, CancellationToken cancellationToken = default);
-    
+
     /// <summary>
     /// Retracts a workflow definition.
     /// </summary>
     /// <param name="definitionId">The ID of the workflow definition to retract.</param>
+    /// <param name="request">An empty object to satisfy the request body requirement.</param>
     /// <param name="cancellationToken">The cancellation token.</param>
     [Post("/workflow-definitions/{definitionId}/retract")]
-    Task<WorkflowDefinition> RetractAsync(string definitionId, CancellationToken cancellationToken = default);
+    [Headers(MediaTypeNames.Application.Json)]
+    Task<WorkflowDefinition> RetractAsync(string definitionId, RetractWorkflowDefinitionRequest request, CancellationToken cancellationToken = default);
     
     /// <summary>
     /// Deletes many workflow definitions.
@@ -110,4 +113,13 @@ public interface IWorkflowDefinitionsApi
     /// <param name="cancellationToken">The cancellation token.</param>
     [Get("/workflow-definitions/{definitionId}/export?versionOptions={versionOptions}")]
     Task<IApiResponse<Stream>> ExportAsync(string definitionId, VersionOptions? versionOptions = default, CancellationToken cancellationToken = default);
+    
+    /// <summary>
+    /// Imports a workflow definition.
+    /// </summary>
+    /// <param name="model">The model containing the workflow definition to import.</param>
+    /// <param name="cancellationToken">The cancellation token.</param>
+    /// <returns>The imported workflow definition.</returns>
+    [Post("/workflow-definitions/import")]
+    Task<WorkflowDefinition> ImportAsync(WorkflowDefinitionModel model, CancellationToken cancellationToken = default);
 }
\ No newline at end of file
diff --git a/src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Models/RetractWorkflowDefinitionRequest.cs b/src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Models/RetractWorkflowDefinitionRequest.cs
new file mode 100644
index 000000000..5714b01c5
--- /dev/null
+++ b/src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Models/RetractWorkflowDefinitionRequest.cs
@@ -0,0 +1,6 @@
+namespace Elsa.Api.Client.Resources.WorkflowDefinitions.Models;
+
+/// <summary>
+/// Request to retract a workflow definition.
+/// </summary>
+public record RetractWorkflowDefinitionRequest();
\ No newline at end of file