diff --git a/app/nexus.go b/app/nexus.go
index 5837bcb..8dccdbc 100644
--- a/app/nexus.go
+++ b/app/nexus.go
@@ -298,6 +298,12 @@ func NewNexusCommand(getNexusClientFn GetNexusClientFn) (CommandOut, error) {
 		Usage:    "Namespace that is allowed to call this endpoint",
 		Required: true,
 	}
+	allowNamespaceFlagOptional := &cli.StringSliceFlag{
+		Name:     allowNamespaceFlag.Name,
+		Aliases:  allowNamespaceFlag.Aliases,
+		Usage:    allowNamespaceFlag.Usage + " (optional)",
+		Required: false,
+	}
 	namespaceFlag := &cli.StringSliceFlag{
 		Name:     "namespace",
 		Aliases:  []string{"ns"},
@@ -386,7 +392,7 @@ func NewNexusCommand(getNexusClientFn GetNexusClientFn) (CommandOut, error) {
 								endpointDescriptionFileOptionalFlag,
 								targetNamespaceFlag,
 								targetTaskQueueFlag,
-								allowNamespaceFlag,
+								allowNamespaceFlagOptional,
 								RequestIDFlag,
 							},
 							Action: func(ctx *cli.Context) error {
@@ -400,7 +406,7 @@ func NewNexusCommand(getNexusClientFn GetNexusClientFn) (CommandOut, error) {
 									endpointDescription,
 									ctx.String(targetNamespaceFlag.Name),
 									ctx.String(targetTaskQueueFlag.Name),
-									ctx.StringSlice(allowNamespaceFlag.Name),
+									ctx.StringSlice(allowNamespaceFlagOptional.Name),
 									ctx.String(RequestIDFlag.Name),
 								)
 								if err != nil {
@@ -422,7 +428,7 @@ func NewNexusCommand(getNexusClientFn GetNexusClientFn) (CommandOut, error) {
 								endpointDescriptionOptionalFlag,
 								endpointDescriptionFileOptionalFlag,
 								unsetEndpointDescriptionOptionalFlag,
-								targetNamespaceFlagOptional,
+								// targetNamespaceFlagOptional, TODO: Uncomment when we support updating target namespace
 								targetTaskQueueFlagOptional,
 								ResourceVersionFlag,
 								RequestIDFlag,
diff --git a/app/nexus_test.go b/app/nexus_test.go
index 4921ebb..8858e4b 100644
--- a/app/nexus_test.go
+++ b/app/nexus_test.go
@@ -230,8 +230,8 @@ func (s *NexusTestSuite) TestEndpointUpdate() {
 		"--request-id", exampleEndpoint.AsyncOperationId,
 	))
 
-	// update target-namespace success
-	s.mockCloudService.EXPECT().GetNexusEndpoints(gomock.Any(), gomock.Any()).Return(&cloudservice.GetNexusEndpointsResponse{Endpoints: []*nexus.Endpoint{getExampleNexusEndpoint()}}, nil).Times(1)
+	// update target-namespace success TODO: Uncomment when we support updating target namespace
+	/*s.mockCloudService.EXPECT().GetNexusEndpoints(gomock.Any(), gomock.Any()).Return(&cloudservice.GetNexusEndpointsResponse{Endpoints: []*nexus.Endpoint{getExampleNexusEndpoint()}}, nil).Times(1)
 	s.mockCloudService.EXPECT().UpdateNexusEndpoint(gomock.Any(), gomock.Any()).Return(&cloudservice.UpdateNexusEndpointResponse{
 		AsyncOperation: &operation.AsyncOperation{
 			Id: exampleEndpoint.AsyncOperationId,
@@ -241,7 +241,7 @@ func (s *NexusTestSuite) TestEndpointUpdate() {
 		"--name", exampleEndpoint.Spec.Name,
 		"--target-namespace", exampleEndpoint.Spec.TargetSpec.WorkerTargetSpec.NamespaceId+"-updated",
 		"--request-id", exampleEndpoint.AsyncOperationId,
-	))
+	))*/
 
 	// update description file success
 	path := "nexus_endpoint_description_test.md"
@@ -295,7 +295,7 @@ func (s *NexusTestSuite) TestEndpointUpdate() {
 	s.NoError(s.RunCmd("nexus", "endpoint", "update",
 		"--name", exampleEndpoint.Spec.Name,
 		"--description", exampleEndpoint.Spec.Description+"-updated",
-		"--target-namespace", exampleEndpoint.Spec.TargetSpec.WorkerTargetSpec.NamespaceId+"-updated",
+		// "--target-namespace", exampleEndpoint.Spec.TargetSpec.WorkerTargetSpec.NamespaceId+"-updated",
 		"--target-task-queue", exampleEndpoint.Spec.TargetSpec.WorkerTargetSpec.TaskQueue+"-updated",
 		"--request-id", exampleEndpoint.AsyncOperationId,
 	))