diff --git a/src/modules/Elsa.Workflows.Core/Activities/Flowchart/Activities/FlowDecision.cs b/src/modules/Elsa.Workflows.Core/Activities/Flowchart/Activities/FlowDecision.cs
index 199885071..5d071322a 100644
--- a/src/modules/Elsa.Workflows.Core/Activities/Flowchart/Activities/FlowDecision.cs
+++ b/src/modules/Elsa.Workflows.Core/Activities/Flowchart/Activities/FlowDecision.cs
@@ -1,4 +1,5 @@
 using System.Runtime.CompilerServices;
+using System.Text.Json.Serialization;
 using Elsa.Expressions.Models;
 using Elsa.Extensions;
 using Elsa.Workflows.Core.Activities.Flowchart.Attributes;
@@ -18,6 +19,7 @@ namespace Elsa.Workflows.Core.Activities.Flowchart.Activities;
 public class FlowDecision : Activity
 {
     /// <inheritdoc />
+    [JsonConstructor]
     public FlowDecision([CallerFilePath] string? source = default, [CallerLineNumber] int? line = default) : base(source, line)
     {
     }