diff --git a/kubectl-plugin/install/kk.go b/kubectl-plugin/install/kk.go
index 64ff3a4..e8667ae 100644
--- a/kubectl-plugin/install/kk.go
+++ b/kubectl-plugin/install/kk.go
@@ -36,7 +36,7 @@ ks install kk --version nightly --components devops`,
 	flags := cmd.Flags()
 	flags.StringVarP(&opt.version, "version", "v", types.KsVersion,
 		fmt.Sprintf("The version of KubeSphere. Support value could be %s, nightly, nightly-20210309. nightly equals to nightly-latest", types.KsVersion))
-	flags.StringVarP(&opt.version, "kubernetesVersion", "", types.K8sVersion,
+	flags.StringVarP(&opt.kubernetesVersion, "kubernetesVersion", "", types.K8sVersion,
 		"The version of Kubernetes")
 	flags.StringArrayVarP(&opt.components, "components", "", []string{},
 		"The components which you want to enable after the installation")