diff --git a/js/script.js b/js/script.js
index 927db54..565349e 100644
--- a/js/script.js
+++ b/js/script.js
@@ -81,7 +81,7 @@
   document.getElementById('concert-title').textContent = booklet.title;
   document.getElementById('concert-subtitle').textContent = booklet.subtitle;
 
-  if (!booklet?.showTitle)
+  if (booklet?.showTitle === false)
     document.getElementById('booklet-header').classList
         .add('booklet-header--invisible');
   else
diff --git a/sw.js b/sw.js
index 04c401d..4de9e66 100644
--- a/sw.js
+++ b/sw.js
@@ -1,4 +1,4 @@
-var CACHE_NAME = 'all-v1.1.10';
+var CACHE_NAME = 'all-v1.1.11';
 var urlsToCache = [
   '/',
   '/css/styles.css',