diff --git a/apis/delivery/v1alpha1/sync_types.go b/apis/delivery/v1alpha1/sync_types.go
index 6e26d75..7f1535f 100644
--- a/apis/delivery/v1alpha1/sync_types.go
+++ b/apis/delivery/v1alpha1/sync_types.go
@@ -7,6 +7,7 @@ package v1alpha1
 import (
 	"time"
 
+	"github.com/fluxcd/pkg/apis/meta"
 	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 )
@@ -33,12 +34,12 @@ type PullRequestTemplate struct {
 
 // SyncSpec defines the desired state of Sync
 type SyncSpec struct {
-	SnapshotRef    v1.LocalObjectReference `json:"snapshotRef"`
-	RepositoryRef  v1.LocalObjectReference `json:"repositoryRef"`
-	Interval       metav1.Duration         `json:"interval"`
-	CommitTemplate CommitTemplate          `json:"commitTemplate"`
-	SubPath        string                  `json:"subPath"`
-	Prune          bool                    `json:"prune,omitempty"`
+	SnapshotRef    v1.LocalObjectReference        `json:"snapshotRef"`
+	RepositoryRef  meta.NamespacedObjectReference `json:"repositoryRef"`
+	Interval       metav1.Duration                `json:"interval"`
+	CommitTemplate CommitTemplate                 `json:"commitTemplate"`
+	SubPath        string                         `json:"subPath"`
+	Prune          bool                           `json:"prune,omitempty"`
 
 	//+optional
 	AutomaticPullRequestCreation bool `json:"automaticPullRequestCreation,omitempty"`
diff --git a/config/crd/bases/delivery.ocm.software_syncs.yaml b/config/crd/bases/delivery.ocm.software_syncs.yaml
index 7ddaa0d..f6785d4 100644
--- a/config/crd/bases/delivery.ocm.software_syncs.yaml
+++ b/config/crd/bases/delivery.ocm.software_syncs.yaml
@@ -73,15 +73,19 @@ spec:
                     type: string
                 type: object
               repositoryRef:
-                description: LocalObjectReference contains enough information to let
-                  you locate the referenced object inside the same namespace.
+                description: NamespacedObjectReference contains enough information
+                  to locate the referenced Kubernetes resource object in any namespace.
                 properties:
                   name:
-                    description: 'Name of the referent. More info: https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#names
-                      TODO: Add other useful fields. apiVersion, kind, uid?'
+                    description: Name of the referent.
                     type: string
+                  namespace:
+                    description: Namespace of the referent, when not specified it
+                      acts as LocalObjectReference.
+                    type: string
+                required:
+                - name
                 type: object
-                x-kubernetes-map-type: atomic
               snapshotRef:
                 description: LocalObjectReference contains enough information to let
                   you locate the referenced object inside the same namespace.
diff --git a/controllers/delivery/sync_controller.go b/controllers/delivery/sync_controller.go
index e2d8873..39aa960 100644
--- a/controllers/delivery/sync_controller.go
+++ b/controllers/delivery/sync_controller.go
@@ -141,9 +141,14 @@ func (r *SyncReconciler) Reconcile(ctx context.Context, req ctrl.Request) (resul
 
 	log.V(4).Info("found target snapshot")
 
+	namespace := obj.Spec.RepositoryRef.Namespace
+	if namespace == "" {
+		namespace = obj.Namespace
+	}
+
 	repository := &mpasv1alpha1.Repository{}
 	if err = r.Get(ctx, types.NamespacedName{
-		Namespace: obj.Namespace,
+		Namespace: namespace,
 		Name:      obj.Spec.RepositoryRef.Name,
 	}, repository); err != nil {
 		err = fmt.Errorf("failed to find repository: %w", err)
@@ -156,7 +161,7 @@ func (r *SyncReconciler) Reconcile(ctx context.Context, req ctrl.Request) (resul
 
 	authSecret := &corev1.Secret{}
 	if err = r.Get(ctx, types.NamespacedName{
-		Namespace: obj.Namespace,
+		Namespace: repository.Namespace,
 		Name:      repository.Spec.Credentials.SecretRef.Name,
 	}, authSecret); err != nil {
 		err = fmt.Errorf("failed to find authentication secret: %w", err)
diff --git a/controllers/delivery/sync_controller_test.go b/controllers/delivery/sync_controller_test.go
index 57fc4b3..c45ada0 100644
--- a/controllers/delivery/sync_controller_test.go
+++ b/controllers/delivery/sync_controller_test.go
@@ -65,7 +65,7 @@ func TestSyncReconciler(t *testing.T) {
 			SnapshotRef: v1.LocalObjectReference{
 				Name: snapshot.Name,
 			},
-			RepositoryRef: v1.LocalObjectReference{
+			RepositoryRef: meta.NamespacedObjectReference{
 				Name: repository.Name,
 			},
 			CommitTemplate: v1alpha1.CommitTemplate{
@@ -117,7 +117,7 @@ func TestSyncReconcilerIsSkippedIfDigestIsAlreadyPresent(t *testing.T) {
 			SnapshotRef: v1.LocalObjectReference{
 				Name: "test",
 			},
-			RepositoryRef: v1.LocalObjectReference{
+			RepositoryRef: meta.NamespacedObjectReference{
 				Name: "test",
 			},
 			CommitTemplate: v1alpha1.CommitTemplate{
@@ -198,7 +198,7 @@ func TestSyncReconcilerWithAutomaticPullRequest(t *testing.T) {
 			SnapshotRef: v1.LocalObjectReference{
 				Name: snapshot.Name,
 			},
-			RepositoryRef: v1.LocalObjectReference{
+			RepositoryRef: meta.NamespacedObjectReference{
 				Name: repository.Name,
 			},
 			CommitTemplate: v1alpha1.CommitTemplate{