diff --git a/src/modules/Elsa.WorkflowContexts/Extensions/ActivityExtensions.cs b/src/modules/Elsa.WorkflowContexts/Extensions/ActivityExtensions.cs
index 8d9975a03..d5c22cc0e 100644
--- a/src/modules/Elsa.WorkflowContexts/Extensions/ActivityExtensions.cs
+++ b/src/modules/Elsa.WorkflowContexts/Extensions/ActivityExtensions.cs
@@ -18,7 +18,21 @@ public static class ActivityExtensions
     /// <returns>The workflow context settings.</returns>
     public static IDictionary<Type, ActivityWorkflowContextSettings> GetWorkflowContextSettings(this IActivity activity)
     {
-        return activity.CustomProperties.GetOrAdd(ActivityWorkflowContextSettingsKey, () => new Dictionary<Type, ActivityWorkflowContextSettings>())!;
+        var contextSetttings =  activity.CustomProperties.GetOrAdd(ActivityWorkflowContextSettingsKey, () => new Dictionary<string, ActivityWorkflowContextSettings>())!;
+
+        var result = new Dictionary<Type, ActivityWorkflowContextSettings>();
+
+        foreach(var (key,value) in contextSetttings)
+        {
+            var targetType = Type.GetType(key);
+
+            if(targetType != null)
+            {
+                result.Add(targetType, value);
+            }
+        }
+
+        return result;
     }
 
     /// <summary>
diff --git a/src/modules/Elsa.WorkflowContexts/Extensions/WorkflowExtensions.cs b/src/modules/Elsa.WorkflowContexts/Extensions/WorkflowExtensions.cs
index 25bcbde52..1ebba29a0 100644
--- a/src/modules/Elsa.WorkflowContexts/Extensions/WorkflowExtensions.cs
+++ b/src/modules/Elsa.WorkflowContexts/Extensions/WorkflowExtensions.cs
@@ -14,5 +14,22 @@ public static class WorkflowExtensions
     /// </summary>
     /// <param name="workflow">The workflow to get the provider types from.</param>
     /// <returns>The workflow context provider types.</returns>
-    public static IEnumerable<Type> GetWorkflowContextProviderTypes(this Workflow workflow) => workflow.CustomProperties.GetOrAdd(Constants.WorkflowContextProviderTypesKey, () => new List<Type>());
+    public static IEnumerable<Type> GetWorkflowContextProviderTypes(this Workflow workflow)
+    {
+        var contextProviderTypes = workflow.PropertyBag.GetOrAdd(Constants.WorkflowContextProviderTypesKey, () => new List<String>());
+
+        var result = new List<Type>();
+
+        foreach (var type in contextProviderTypes)
+        {
+            var targetType = Type.GetType(type);
+
+            if (targetType != null)
+            {
+                result.Add(targetType);
+            }
+        }
+
+        return result;
+    }
 }
\ No newline at end of file
diff --git a/src/modules/Elsa.WorkflowContexts/Middleware/WorkflowContextWorkflowExecutionMiddleware.cs b/src/modules/Elsa.WorkflowContexts/Middleware/WorkflowContextWorkflowExecutionMiddleware.cs
index e06764a3e..5bb6c8e49 100644
--- a/src/modules/Elsa.WorkflowContexts/Middleware/WorkflowContextWorkflowExecutionMiddleware.cs
+++ b/src/modules/Elsa.WorkflowContexts/Middleware/WorkflowContextWorkflowExecutionMiddleware.cs
@@ -1,7 +1,10 @@
+using System.Text.Json;
+using Elsa.Expressions.Contracts;
 using Elsa.Extensions;
 using Elsa.WorkflowContexts.Contracts;
 using Elsa.Workflows;
 using Elsa.Workflows.Pipelines.WorkflowExecution;
+using Elsa.Workflows.Serialization.Converters;
 using Microsoft.Extensions.DependencyInjection;
 
 namespace Elsa.WorkflowContexts.Middleware;
@@ -9,28 +12,26 @@ namespace Elsa.WorkflowContexts.Middleware;
 /// <summary>
 /// Middleware that loads and save workflow context into the currently executing workflow using installed workflow context providers. 
 /// </summary>
-public class WorkflowContextWorkflowExecutionMiddleware : WorkflowExecutionMiddleware
-{
-    private readonly IServiceScopeFactory _serviceScopeFactory;
-
-    /// <inheritdoc />
-    public WorkflowContextWorkflowExecutionMiddleware(WorkflowMiddlewareDelegate next, IServiceScopeFactory serviceScopeFactory) : base(next)
+/// <inheritdoc />
+public class WorkflowContextWorkflowExecutionMiddleware(WorkflowMiddlewareDelegate next, IServiceScopeFactory serviceScopeFactory, IWellKnownTypeRegistry wellKnownTypeRegistry) : WorkflowExecutionMiddleware(next)
+{
+    private readonly JsonSerializerOptions _jsonSerializerOptions = new JsonSerializerOptions
     {
-        _serviceScopeFactory = serviceScopeFactory;
-    }
-
+        PropertyNameCaseInsensitive = true
+    }.WithConverters(new TypeJsonConverter(wellKnownTypeRegistry));
+
     /// <inheritdoc />
     public override async ValueTask InvokeAsync(WorkflowExecutionContext context)
     {
         // Check if the workflow contains any workflow context providers.
-        if (!context.Workflow.CustomProperties.TryGetValue<ICollection<Type>>(Constants.WorkflowContextProviderTypesKey, out var providerTypes))
+        if (!context.Workflow.PropertyBag.TryGetValue<ICollection<Type>>(Constants.WorkflowContextProviderTypesKey, out var providerTypes, _jsonSerializerOptions))
         {
             await Next(context);
             return;
         }
 
         // Invoke each workflow context provider.
-        using (var scope = _serviceScopeFactory.CreateScope())
+        using (var scope = serviceScopeFactory.CreateScope())
         {
             foreach (var providerType in providerTypes)
             {
@@ -46,7 +47,7 @@ public class WorkflowContextWorkflowExecutionMiddleware : WorkflowExecutionMiddl
         await Next(context);
 
         // Invoke each workflow context provider to persists the context.
-        using (var scope = _serviceScopeFactory.CreateScope())
+        using (var scope = serviceScopeFactory.CreateScope())
         {
             foreach (var providerType in providerTypes)
             {