diff --git a/src/dashboards/blazor/ElsaDashboard.Shared/Rpc/WorkflowDefinition/Models/GetWorkflowDefinitionByIdRequest.cs b/src/dashboards/blazor/ElsaDashboard.Shared/Rpc/WorkflowDefinition/Models/GetWorkflowDefinitionByIdRequest.cs
index 514759ff9..f28c06df7 100644
--- a/src/dashboards/blazor/ElsaDashboard.Shared/Rpc/WorkflowDefinition/Models/GetWorkflowDefinitionByIdRequest.cs
+++ b/src/dashboards/blazor/ElsaDashboard.Shared/Rpc/WorkflowDefinition/Models/GetWorkflowDefinitionByIdRequest.cs
@@ -16,7 +16,7 @@ namespace ElsaDashboard.Shared.Rpc
             VersionOptions = versionOptions;
         }
 
-        [ProtoMember(1)]  public string WorkflowDefinitionId { get; set; }
+        [ProtoMember(1)]  public string WorkflowDefinitionId { get; set; } = default!;
         [ProtoMember(2)]  public VersionOptions? VersionOptions { get; set; }
     }
 }
\ No newline at end of file
diff --git a/src/dashboards/blazor/ElsaDashboard.Shared/Rpc/WorkflowDefinition/Models/GetWorkflowDefinitionByVersionIdRequest.cs b/src/dashboards/blazor/ElsaDashboard.Shared/Rpc/WorkflowDefinition/Models/GetWorkflowDefinitionByVersionIdRequest.cs
index 53cd2073a..73c776709 100644
--- a/src/dashboards/blazor/ElsaDashboard.Shared/Rpc/WorkflowDefinition/Models/GetWorkflowDefinitionByVersionIdRequest.cs
+++ b/src/dashboards/blazor/ElsaDashboard.Shared/Rpc/WorkflowDefinition/Models/GetWorkflowDefinitionByVersionIdRequest.cs
@@ -14,6 +14,6 @@ namespace ElsaDashboard.Shared.Rpc
             WorkflowDefinitionVersionId = workflowDefinitionVersionId;
         }
 
-        [ProtoMember(1)]  public string WorkflowDefinitionVersionId { get; set; }
+        [ProtoMember(1)] public string WorkflowDefinitionVersionId { get; set; } = default!;
     }
 }
\ No newline at end of file
diff --git a/src/dashboards/blazor/ElsaDashboard.Shared/Rpc/WorkflowInstance/Models/DeleteWorkflowInstanceRequest.cs b/src/dashboards/blazor/ElsaDashboard.Shared/Rpc/WorkflowInstance/Models/DeleteWorkflowInstanceRequest.cs
index c081b2539..9e13c534d 100644
--- a/src/dashboards/blazor/ElsaDashboard.Shared/Rpc/WorkflowInstance/Models/DeleteWorkflowInstanceRequest.cs
+++ b/src/dashboards/blazor/ElsaDashboard.Shared/Rpc/WorkflowInstance/Models/DeleteWorkflowInstanceRequest.cs
@@ -15,6 +15,6 @@ namespace ElsaDashboard.Shared.Rpc
             WorkflowInstanceId = workflowInstanceId;
         }
 
-        [ProtoMember(1)] public string WorkflowInstanceId { get; set; }
+        [ProtoMember(1)] public string WorkflowInstanceId { get; set; } = default!;
     }
 }
\ No newline at end of file
diff --git a/src/dashboards/blazor/ElsaDashboard.Shared/Rpc/WorkflowInstance/Models/GetWorkflowInstanceByIdRequest.cs b/src/dashboards/blazor/ElsaDashboard.Shared/Rpc/WorkflowInstance/Models/GetWorkflowInstanceByIdRequest.cs
index da0f34526..6321d614a 100644
--- a/src/dashboards/blazor/ElsaDashboard.Shared/Rpc/WorkflowInstance/Models/GetWorkflowInstanceByIdRequest.cs
+++ b/src/dashboards/blazor/ElsaDashboard.Shared/Rpc/WorkflowInstance/Models/GetWorkflowInstanceByIdRequest.cs
@@ -15,6 +15,6 @@ namespace ElsaDashboard.Shared.Rpc
             WorkflowInstanceId = workflowInstanceId;
         }
 
-        [ProtoMember(1)] public string WorkflowInstanceId { get; set; }
+        [ProtoMember(1)] public string WorkflowInstanceId { get; set; } = default!;
     }
 }
\ No newline at end of file