diff --git a/event/listener.php b/event/listener.php
index 203d58e..c05ad5e 100644
--- a/event/listener.php
+++ b/event/listener.php
@@ -30,6 +30,7 @@ public static function getSubscribedEvents()
 			'core.ucp_notifications_output_notification_types_modify_template_vars'	=> 'load_template_data',
 			'core.ucp_display_module_before'	=> 'load_language',
 			'core.acp_main_notice'				=> 'compatibility_notice',
+			'core.page_header_after'			=> 'service_worker_url',
 		];
 	}
 
@@ -90,4 +91,15 @@ public function compatibility_notice()
 	{
 		$this->template->assign_var('S_WPN_COMPATIBILITY_NOTICE', phpbb_version_compare(PHPBB_VERSION, '4.0.0-dev', '>='));
 	}
+
+	/**
+	 * Generate service worker URL globally for update
+	 */
+	public function service_worker_url()
+	{
+		if (!$this->template->retrieve_var('U_WEBPUSH_WORKER_URL'))
+		{
+			$this->template->assign_var('U_WEBPUSH_WORKER_URL', $this->controller_helper->route('phpbb_webpushnotifications_ucp_push_worker_controller'));
+		}
+	}
 }
diff --git a/notification/method/webpush.php b/notification/method/webpush.php
index 295b12b..8e74fbb 100644
--- a/notification/method/webpush.php
+++ b/notification/method/webpush.php
@@ -445,7 +445,7 @@ protected function clean_expired_subscriptions(array $user_subscription_map, arr
 	 * into https://myboard.url/path/to/avatar=123456789.gif
 	 *
 	 * @param string $avatar
-	 * @return string Absolute path to avatar image
+	 * @return array 'src' => Absolute path to avatar image
 	 */
 	protected function prepare_avatar($avatar)
 	{
@@ -455,7 +455,7 @@ protected function prepare_avatar($avatar)
 
 		$path = !empty($matches[1]) ? end($matches[1]) : $avatar;
 
-		return preg_replace('#^' . preg_quote($this->path_helper->get_web_root_path(), '#') . '#', $this->get_board_url(), $path, 1);
+		return ['src' => preg_replace('#^' . preg_quote($this->path_helper->get_web_root_path(), '#') . '#', $this->get_board_url(), $path, 1)];
 	}
 
 	/**
diff --git a/styles/all/template/push_worker.js.twig b/styles/all/template/push_worker.js.twig
index 428c211..8d6ec3c 100644
--- a/styles/all/template/push_worker.js.twig
+++ b/styles/all/template/push_worker.js.twig
@@ -36,7 +36,7 @@ self.addEventListener('push', event => {
 			const options = {
 				body: responseBody,
 				data: response,
-				icon: response.avatar,
+				icon: response.avatar.src,
 			};
 			self.registration.showNotification(response.heading, options);
 		});
diff --git a/styles/all/template/update_worker.js b/styles/all/template/update_worker.js
new file mode 100644
index 0000000..11bb989
--- /dev/null
+++ b/styles/all/template/update_worker.js
@@ -0,0 +1,29 @@
+'use strict';
+
+function webpushWorkerUpdate() {
+	if ('serviceWorker' in navigator) {
+		navigator.serviceWorker.getRegistration(serviceWorkerUrl)
+			.then((registration) => {
+				registration.update();
+			})
+			.catch(error => {
+				// Service worker could not be updated
+				console.info(error);
+			});
+	}
+}
+// Do not redeclare function if exist
+if (typeof domReady === 'undefined') {
+	window.domReady = function(callBack) {
+		if (document.readyState === 'loading') {
+			document.addEventListener('DOMContentLoaded', callBack);
+		} else {
+			callBack();
+		}
+	}
+}
+
+domReady(() => {
+	/* global serviceWorkerUrl */
+	webpushWorkerUpdate();
+});
diff --git a/styles/prosilver/template/event/overall_footer_after.html b/styles/prosilver/template/event/overall_footer_after.html
new file mode 100644
index 0000000..9249944
--- /dev/null
+++ b/styles/prosilver/template/event/overall_footer_after.html
@@ -0,0 +1,4 @@
+<script>
+	const serviceWorkerUrl = '{{ U_WEBPUSH_WORKER_URL }}';
+</script>
+{% INCLUDEJS('@phpbb_webpushnotifications/update_worker.js') %}
diff --git a/tests/event/listener_test.php b/tests/event/listener_test.php
index 3045ad6..b226de9 100644
--- a/tests/event/listener_test.php
+++ b/tests/event/listener_test.php
@@ -117,6 +117,7 @@ public function test_getSubscribedEvents()
 			'core.ucp_notifications_output_notification_types_modify_template_vars',
 			'core.ucp_display_module_before',
 			'core.acp_main_notice',
+			'core.page_header_after',
 		], array_keys(\phpbb\webpushnotifications\event\listener::getSubscribedEvents()));
 	}