diff --git a/src/core/Elsa.Core/Activities/ControlFlow/ForEach/ForEachBuilderExtensions.cs b/src/core/Elsa.Core/Activities/ControlFlow/ForEach/ForEachBuilderExtensions.cs
index a081e45d6..68e246783 100644
--- a/src/core/Elsa.Core/Activities/ControlFlow/ForEach/ForEachBuilderExtensions.cs
+++ b/src/core/Elsa.Core/Activities/ControlFlow/ForEach/ForEachBuilderExtensions.cs
@@ -25,7 +25,7 @@ namespace Elsa.Activities.ControlFlow
             Action<IOutcomeBuilder> iterate,
             [CallerLineNumber] int lineNumber = default,
             [CallerFilePath] string? sourceFile = default) =>
-            builder.ForEach(activity => activity.Set(x => x.Items, context => items(context).Cast<object>()), iterate, lineNumber, sourceFile);
+            builder.ForEach(activity => activity.Set(x => x.Items, context => items(context).Select(x => (object)x!)), iterate, lineNumber, sourceFile);
 
         public static IActivityBuilder ForEach<T>(
             this IBuilder builder,
@@ -41,6 +41,6 @@ namespace Elsa.Activities.ControlFlow
             Action<IOutcomeBuilder> iterate,
             [CallerLineNumber] int lineNumber = default,
             [CallerFilePath] string? sourceFile = default) =>
-            builder.ForEach(activity => activity.Set(x => x.Items, items.Cast<object>()), iterate, lineNumber, sourceFile);
+            builder.ForEach(activity => activity.Set(x => x.Items, items.Select(x => (object)x!)), iterate, lineNumber, sourceFile);
     }
 }
\ No newline at end of file
diff --git a/src/core/Elsa.Core/Activities/ControlFlow/ParallelForEach/ParallelForEachBuilderExtensions.cs b/src/core/Elsa.Core/Activities/ControlFlow/ParallelForEach/ParallelForEachBuilderExtensions.cs
index 0c1d98953..30deb1c92 100644
--- a/src/core/Elsa.Core/Activities/ControlFlow/ParallelForEach/ParallelForEachBuilderExtensions.cs
+++ b/src/core/Elsa.Core/Activities/ControlFlow/ParallelForEach/ParallelForEachBuilderExtensions.cs
@@ -25,7 +25,7 @@ namespace Elsa.Activities.ControlFlow
             Action<IOutcomeBuilder> iterate,
             [CallerLineNumber] int lineNumber = default,
             [CallerFilePath] string? sourceFile = default) =>
-            builder.ParallelForEach(activity => activity.Set(x => x.Items, context => items(context).Cast<object>()), iterate, lineNumber, sourceFile);
+            builder.ParallelForEach(activity => activity.Set(x => x.Items, context => items(context).Select(x => (object)x!).ToList()), iterate, lineNumber, sourceFile);
 
         public static IActivityBuilder ParallelForEach<T>(
             this IBuilder builder,
@@ -33,7 +33,7 @@ namespace Elsa.Activities.ControlFlow
             Action<IOutcomeBuilder> iterate,
             [CallerLineNumber] int lineNumber = default,
             [CallerFilePath] string? sourceFile = default) =>
-            builder.ParallelForEach(activity => activity.Set(x => x.Items, () => items().Cast<object>()), iterate, lineNumber, sourceFile);
+            builder.ParallelForEach(activity => activity.Set(x => x.Items, () => items().Select(x => (object)x!).ToList()), iterate, lineNumber, sourceFile);
 
         public static IActivityBuilder ParallelForEach<T>(
             this IBuilder builder,
@@ -41,6 +41,6 @@ namespace Elsa.Activities.ControlFlow
             Action<IOutcomeBuilder> iterate,
             [CallerLineNumber] int lineNumber = default,
             [CallerFilePath] string? sourceFile = default) =>
-            builder.ParallelForEach(activity => activity.Set(x => x.Items, items.Cast<object>()), iterate, lineNumber, sourceFile);
+            builder.ParallelForEach(activity => activity.Set(x => x.Items, items.Select(x => (object)x!).ToList()), iterate, lineNumber, sourceFile);
     }
 }
\ No newline at end of file