diff --git a/assets/js/pwa-register.js b/assets/js/pwa-register.js
index 7baf4f1..3908f84 100644
--- a/assets/js/pwa-register.js
+++ b/assets/js/pwa-register.js
@@ -9,6 +9,10 @@
 	var swUrl = cfg.swUrl || '/sw.js';
 	var scope = cfg.scope || '/';
 
+	if ( cfg.requireLogin && ! cfg.isLoggedIn ) {
+		return;
+	}
+
 	// ------------------------------------------------------------------
 	// Service Worker registrieren
 	// ------------------------------------------------------------------
diff --git a/assets/js/service-worker.js b/assets/js/service-worker.js
index 2801390..eb3110f 100644
--- a/assets/js/service-worker.js
+++ b/assets/js/service-worker.js
@@ -8,7 +8,7 @@
 
 'use strict';
 
-const CACHE_NAME    = 'kgv-pwa-v1';
+const CACHE_NAME    = 'kgv-pwa-v1-0-1';
 const OFFLINE_PAGE  = '/';
 
 const PRECACHE_URLS = [
diff --git a/kgv-pwa.php b/kgv-pwa.php
index 9388006..3546041 100644
--- a/kgv-pwa.php
+++ b/kgv-pwa.php
@@ -3,7 +3,7 @@
  * Plugin Name: KGV PWA
  * Plugin URI: https://apex-project.de/
  * Description: Progressive Web App Unterstützung fuer KGV-Webseiten – Web App Manifest, Service Worker und Install-Banner.
- * Version: 1.0.0
+ * Version: 1.0.1
  * Author: Ronny Grobel
  * Author URI: https://apex-project.de/
  * Text Domain: kgv-pwa
@@ -18,7 +18,7 @@ if ( ! defined( 'ABSPATH' ) ) {
 
 final class KGV_PWA_Plugin {
 
-	const VERSION    = '1.0.0';
+	const VERSION    = '1.0.1';
 	const OPTION_KEY = 'kgv_pwa_settings';
 	const REWRITE_VERSION_OPTION = 'kgv_pwa_rewrite_version';
 
@@ -99,6 +99,11 @@ final class KGV_PWA_Plugin {
 			return;
 		}
 
+		if ( ! is_user_logged_in() ) {
+			status_header( 403 );
+			exit;
+		}
+
 		$settings = $this->get_settings();
 
 		$manifest = array(
@@ -172,6 +177,11 @@ final class KGV_PWA_Plugin {
 			return;
 		}
 
+		if ( ! is_user_logged_in() ) {
+			status_header( 403 );
+			exit;
+		}
+
 		$sw_file = plugin_dir_path( __FILE__ ) . 'assets/js/service-worker.js';
 
 		if ( ! file_exists( $sw_file ) ) {
@@ -193,6 +203,10 @@ final class KGV_PWA_Plugin {
 	// -------------------------------------------------------------------------
 
 	public function output_head_tags() {
+		if ( ! is_user_logged_in() ) {
+			return;
+		}
+
 		$settings  = $this->get_settings();
 		$app_name  = esc_attr( $settings['app_name'] );
 		$theme_hex = esc_attr( $settings['theme_color'] );
@@ -221,6 +235,10 @@ final class KGV_PWA_Plugin {
 	}
 
 	public function enqueue_assets() {
+		if ( ! is_user_logged_in() ) {
+			return;
+		}
+
 		$sw_url = $this->get_service_worker_url();
 		$scope  = trailingslashit( home_url( '/' ) );
 
@@ -245,6 +263,8 @@ final class KGV_PWA_Plugin {
 			array(
 				'swUrl'            => esc_url_raw( $sw_url ),
 				'scope'            => esc_url_raw( $scope ),
+				'requireLogin'     => true,
+				'isLoggedIn'       => is_user_logged_in(),
 				'iosInstallNotice' => __( 'Auf iPhone/iPad: Im Browser auf Teilen tippen und dann "Zum Home-Bildschirm" waehlen.', 'kgv-pwa' ),
 			)
 		);
@@ -259,6 +279,10 @@ final class KGV_PWA_Plugin {
 	 *   class  – Zusätzliche CSS-Klassen
 	 */
 	public function render_install_button( $atts ) {
+		if ( ! is_user_logged_in() ) {
+			return '';
+		}
+
 		$atts = shortcode_atts(
 			array(
 				'label' => __( 'App installieren', 'kgv-pwa' ),
diff --git a/readme.txt b/readme.txt
index 30d8b8f..9de0107 100644
--- a/readme.txt
+++ b/readme.txt
@@ -3,7 +3,7 @@ Contributors: ronnygrobel
 Tags: pwa, progressive web app, manifest, service worker, offline
 Requires at least: 6.0
 Tested up to: 6.7
-Stable tag: 1.0.0
+Stable tag: 1.0.1
 Requires PHP: 7.4
 License: GPLv2 or later
 License URI: https://www.gnu.org/licenses/gpl-2.0.html
@@ -43,5 +43,10 @@ Werden keine Icons angegeben, wird automatisch das WordPress-Site-Icon verwendet
 
 == Changelog ==
 
+= 1.0.1 =
+* PWA-Installation auf eingeloggte Benutzer begrenzt
+* Manifest und Service Worker geben fuer Gaeste HTTP 403 zurueck
+* Frontend-Assets und Install-Button nur fuer eingeloggte Benutzer aktiv
+
 = 1.0.0 =
 * Erstveröffentlichung