diff --git a/resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/submit/KubernetesClientUtils.scala b/resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/submit/KubernetesClientUtils.scala
index 2b7db0b2f09b5..005a6beff54f5 100644
--- a/resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/submit/KubernetesClientUtils.scala
+++ b/resource-managers/kubernetes/core/src/main/scala/org/apache/spark/deploy/k8s/submit/KubernetesClientUtils.scala
@@ -29,7 +29,7 @@ import scala.jdk.CollectionConverters._
 import io.fabric8.kubernetes.api.model.{ConfigMap, ConfigMapBuilder, KeyToPath}
 
 import org.apache.spark.SparkConf
-import org.apache.spark.annotation.{DeveloperApi, Since, Unstable}
+import org.apache.spark.annotation.{DeveloperApi, Since, Stable}
 import org.apache.spark.deploy.k8s.{Config, Constants, KubernetesUtils}
 import org.apache.spark.deploy.k8s.Config.{KUBERNETES_DNS_SUBDOMAIN_NAME_MAX_LENGTH, KUBERNETES_NAMESPACE}
 import org.apache.spark.deploy.k8s.Constants.ENV_SPARK_CONF_DIR
@@ -42,8 +42,9 @@ import org.apache.spark.util.ArrayImplicits._
  *
  * A utility class used for K8s operations internally and Spark K8s operator.
  */
-@Unstable
+@Stable
 @DeveloperApi
+@Since("3.1.0")
 object KubernetesClientUtils extends Logging {
 
   // Config map name can be KUBERNETES_DNS_SUBDOMAIN_NAME_MAX_LENGTH chars at max.