diff --git a/go.mod b/go.mod
index 1d3d3f9..b7b4a78 100644
--- a/go.mod
+++ b/go.mod
@@ -21,6 +21,7 @@ require (
 	k8s.io/api v0.34.1
 	k8s.io/apimachinery v0.34.1
 	k8s.io/client-go v0.34.1
+	k8s.io/utils v0.0.0-20250820121507-0af2bda4dd1d
 )
 
 require (
@@ -78,7 +79,6 @@ require (
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	k8s.io/klog/v2 v2.130.1 // indirect
 	k8s.io/kube-openapi v0.0.0-20250910181357-589584f1c912 // indirect
-	k8s.io/utils v0.0.0-20250820121507-0af2bda4dd1d // indirect
 	sigs.k8s.io/json v0.0.0-20250730193827-2d320260d730 // indirect
 	sigs.k8s.io/randfill v1.0.0 // indirect
 	sigs.k8s.io/structured-merge-diff/v6 v6.3.0 // indirect
diff --git a/internal/kubernetes.go b/internal/kubernetes.go
index 7be1245..5ac0c2c 100644
--- a/internal/kubernetes.go
+++ b/internal/kubernetes.go
@@ -6,6 +6,7 @@ import (
 	"iter"
 	"log/slog"
 	"math/rand"
+	"slices"
 	"strings"
 	"time"
 
@@ -17,6 +18,7 @@ import (
 	"k8s.io/client-go/rest"
 	"k8s.io/client-go/tools/clientcmd"
 	"k8s.io/client-go/util/flowcontrol"
+	slicesutils "k8s.io/utils/strings/slices"
 )
 
 // ConnectToKubernetesCluster : Try connect to a cluster from inside if path is empty,
@@ -109,6 +111,14 @@ func (exporter *Exporter) parseAllKubeObjects() ([]*certificateRef, []error) {
 }
 
 func (exporter *Exporter) listNamespacesToWatch() ([]string, error) {
+	if len(exporter.KubeIncludeNamespaces) > 0 &&
+		len(exporter.KubeIncludeNamespaceLabels) == 0 &&
+		len(exporter.KubeExcludeNamespaceLabels) == 0 {
+		return slicesutils.Filter(nil, exporter.KubeIncludeNamespaces, func(namespace string) bool {
+			return !slicesutils.Contains(exporter.KubeExcludeNamespaces, namespace)
+		}), nil
+	}
+
 	_, includedLabelsWithValue := exporter.prepareLabelFilters(exporter.KubeIncludeNamespaceLabels)
 	labelSelector := metav1.LabelSelector{MatchLabels: includedLabelsWithValue}
 	namespaces, err := exporter.kubeClient.CoreV1().Namespaces().List(context.Background(), metav1.ListOptions{
@@ -124,27 +134,11 @@ func (exporter *Exporter) listNamespacesToWatch() ([]string, error) {
 func (exporter *Exporter) filterNamespaces(namespaces []v1.Namespace) []string {
 	filteredNamespaces := []*v1.Namespace{}
 	for _, namespace := range namespaces {
-		found := false
-		for _, includeNs := range exporter.KubeIncludeNamespaces {
-			if namespace.Name == includeNs {
-				found = true
-				break
-			}
-		}
-
-		if len(exporter.KubeIncludeNamespaces) > 0 && !found {
+		if len(exporter.KubeIncludeNamespaces) > 0 && !slices.Contains(exporter.KubeIncludeNamespaces, namespace.Name) {
 			continue
 		}
 
-		found = false
-		for _, excludeNs := range exporter.KubeExcludeNamespaces {
-			if namespace.Name == excludeNs {
-				found = true
-				break
-			}
-		}
-
-		if !found {
+		if !slices.Contains(exporter.KubeExcludeNamespaces, namespace.Name) {
 			filteredNamespaces = append(filteredNamespaces, &namespace)
 		}
 	}