diff --git a/Dockerfile b/Dockerfile
index 996afca..817efa8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,7 +9,7 @@ RUN curl -L -o /tmp/download-binaries.sh https://raw.githubusercontent.com/kuber
   && /tmp/download-binaries.sh /usr/local/kubebuilder/bin
 
 WORKDIR /go/src/github.com/summerwind/whitebox-controller
-COPY go.mod go.sum .
+COPY go.mod go.sum ./
 RUN go mod download
 
 COPY . /workspace
diff --git a/config/config.go b/config/config.go
index d6014c7..a5959ee 100644
--- a/config/config.go
+++ b/config/config.go
@@ -149,6 +149,7 @@ func (c *DependentConfig) Validate() error {
 type ReferenceConfig struct {
 	schema.GroupVersionKind
 	NameFieldPath string `json:"nameFieldPath"`
+	NamespaceFieldPath string `json:"namespaceFieldPath,omitempty"`
 }
 
 func (c *ReferenceConfig) Validate() error {
diff --git a/reconciler/reconciler.go b/reconciler/reconciler.go
index 6358a88..ba9ebea 100644
--- a/reconciler/reconciler.go
+++ b/reconciler/reconciler.go
@@ -290,12 +290,29 @@ func (r *Reconciler) getReferences(res *unstructured.Unstructured) (map[string][
 			continue
 		}
 
+		refNamespaces := []string{}
+        if len(ref.NamespaceFieldPath) > 0 {
+            refNss, err := getReferenceNames(res, ref.NamespaceFieldPath)
+		    if err != nil {
+			    return nil, fmt.Errorf("failed to get reference namespace list: %v", err)
+		    }
+            if len(refNss) != len(refNames) {
+			    return nil, fmt.Errorf("Reference name and namespace must match: %v", err)
+            }
+            refNamespaces = refNss
+        }
+
 		for i := range refNames {
 			refRes := &unstructured.Unstructured{}
 			refRes.SetGroupVersionKind(ref.GroupVersionKind)
 
+            refResNamespace := res.GetNamespace()
+            if len(refNamespaces) > 0 {
+                refResNamespace = refNamespaces[i]
+            }
+
 			nn := types.NamespacedName{
-				Namespace: res.GetNamespace(),
+				Namespace: refResNamespace,
 				Name:      refNames[i],
 			}
 			err = r.Get(context.TODO(), nn, refRes)
@@ -303,7 +320,7 @@ func (r *Reconciler) getReferences(res *unstructured.Unstructured) (map[string][
 				if apierrors.IsNotFound(err) {
 					continue
 				}
-				return nil, fmt.Errorf("failed to get a resource '%s/%s': %v", res.GetNamespace(), refNames[i], err)
+				return nil, fmt.Errorf("failed to get a resource '%s/%s': %v", refResNamespace, refNames[i], err)
 			}
 
 			refs[key] = append(refs[key], refRes)
diff --git a/reconciler/reconciler_test.go b/reconciler/reconciler_test.go
index 46b99c4..d6606fe 100644
--- a/reconciler/reconciler_test.go
+++ b/reconciler/reconciler_test.go
@@ -714,7 +714,7 @@ func TestIsDeleting(t *testing.T) {
 	rc := newResourceConfig()
 	object := newObject(rc.GroupVersionKind, "test")
 	deleting := newObject(rc.GroupVersionKind, "test")
-	SetNestedField(deleting.Object, string(time.Now().Unix()), "metadata", "deletionTimestamp")
+	SetNestedField(deleting.Object, fmt.Sprint(time.Now().Unix()), "metadata", "deletionTimestamp")
 
 	Expect(isDeleting(object)).To(BeFalse())
 	Expect(isDeleting(deleting)).To(BeTrue())