diff --git a/src/modules/Elsa.Workflows.Core/Builders/WorkflowBuilder.cs b/src/modules/Elsa.Workflows.Core/Builders/WorkflowBuilder.cs
index b3e78b665..d3b390dd4 100644
--- a/src/modules/Elsa.Workflows.Core/Builders/WorkflowBuilder.cs
+++ b/src/modules/Elsa.Workflows.Core/Builders/WorkflowBuilder.cs
@@ -38,6 +38,9 @@ public class WorkflowBuilder : IWorkflowBuilder
     /// <inheritdoc />
     public string? Description { get; set; }
 
+    /// <inheritdoc />
+    public bool IsReadonly { get; set; }
+
     /// <inheritdoc />
     public IActivity? Root { get; set; }
 
@@ -135,7 +138,7 @@ public class WorkflowBuilder : IWorkflowBuilder
         var identity = new WorkflowIdentity(definitionId, Version, id);
         var publication = WorkflowPublication.LatestAndPublished;
         var workflowMetadata = new WorkflowMetadata(Name, Description);
-        var workflow = new Workflow(identity, publication, workflowMetadata, WorkflowOptions, root, Variables, Inputs, Outputs, Outcomes, CustomProperties);
+        var workflow = new Workflow(identity, publication, workflowMetadata, WorkflowOptions, root, Variables, Inputs, Outputs, Outcomes, CustomProperties, IsReadonly);
 
         // If a Result variable is defined, install it into the workflow so we can capture the output into it.
         if (Result != null)
diff --git a/src/modules/Elsa.Workflows.Core/Contracts/IWorkflowBuilder.cs b/src/modules/Elsa.Workflows.Core/Contracts/IWorkflowBuilder.cs
index 71c8d9fd3..8280ad733 100644
--- a/src/modules/Elsa.Workflows.Core/Contracts/IWorkflowBuilder.cs
+++ b/src/modules/Elsa.Workflows.Core/Contracts/IWorkflowBuilder.cs
@@ -31,7 +31,13 @@ public interface IWorkflowBuilder
     /// A description of the workflow.
     /// </summary>
     string? Description { get; set; }
-    
+
+
+    /// <summary>
+    /// WorkflowDefinition is readonly.
+    /// </summary>
+    bool IsReadonly { get; set; }
+
     /// <summary>
     /// Options for the workflow being built.
     /// </summary>
diff --git a/src/modules/Elsa.Workflows.Core/Models/Workflow.cs b/src/modules/Elsa.Workflows.Core/Models/Workflow.cs
index a3cbd2ca6..93672d8d6 100644
--- a/src/modules/Elsa.Workflows.Core/Models/Workflow.cs
+++ b/src/modules/Elsa.Workflows.Core/Models/Workflow.cs
@@ -28,7 +28,8 @@ public class Workflow : Composite<object>, ICloneable
         ICollection<InputDefinition> inputs,
         ICollection<OutputDefinition> outputs,
         ICollection<string> outcomes,
-        IDictionary<string, object> customProperties)
+        IDictionary<string, object> customProperties,
+        bool isReadonly)
     {
         Identity = identity;
         Publication = publication;
@@ -40,6 +41,7 @@ public class Workflow : Composite<object>, ICloneable
         Variables = variables;
         CustomProperties = customProperties;
         Root = root;
+        IsReadonly = isReadonly;
     }
 
     /// <summary>
@@ -91,7 +93,14 @@ public class Workflow : Composite<object>, ICloneable
     /// Gets or sets options for the workflow.
     /// </summary>
     public WorkflowOptions Options { get; set; } = new();
-    
+
+
+    /// <summary>
+    /// Make workflow definition readonly.
+    /// </summary>
+    public bool IsReadonly { get; set; }
+
+
     /// <summary>
     /// Constructs a new <see cref="Workflow"/> from the specified <see cref="IActivity"/>.
     /// </summary>
diff --git a/src/modules/Elsa.Workflows.Management/Mappers/WorkflowDefinitionMapper.cs b/src/modules/Elsa.Workflows.Management/Mappers/WorkflowDefinitionMapper.cs
index e883e02e3..1081a0d23 100644
--- a/src/modules/Elsa.Workflows.Management/Mappers/WorkflowDefinitionMapper.cs
+++ b/src/modules/Elsa.Workflows.Management/Mappers/WorkflowDefinitionMapper.cs
@@ -44,7 +44,8 @@ public class WorkflowDefinitionMapper
             source.Inputs,
             source.Outputs,
             source.Outcomes,
-            source.CustomProperties);
+            source.CustomProperties,
+            source.IsReadonly);
     }
 
     /// <summary>
@@ -71,7 +72,8 @@ public class WorkflowDefinitionMapper
             source.Inputs ?? new List<InputDefinition>(),
             source.Outputs ?? new List<OutputDefinition>(),
             source.Outcomes ?? new List<string>(),
-            source.CustomProperties ?? new Dictionary<string, object>());
+            source.CustomProperties ?? new Dictionary<string, object>(),
+            source.IsReadonly);
     }
 
     /// <summary>