diff --git a/composer.json b/composer.json
index fb9cde1..aaa82d1 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
     "source": "https://github.com/getkirby/starterkit"
   },
   "require": {
-    "php": ">=7.4.0 <8.1.0",
+    "php": ">=7.4.0 <8.2.0",
     "getkirby/cms": "^3.6"
   },
   "scripts": {
diff --git a/site/blueprints/files/image.yml b/site/blueprints/files/image.yml
index 2514902..64bf18e 100644
--- a/site/blueprints/files/image.yml
+++ b/site/blueprints/files/image.yml
@@ -29,7 +29,7 @@ columns:
             label: Alternative Text
             type: text
           photographer:
-            label: Photogapher
+            label: Photographer
             type: text
             width: 2/3
           license:
diff --git a/site/collections/notes.php b/site/collections/notes.php
index a40e79f..269f43a 100644
--- a/site/collections/notes.php
+++ b/site/collections/notes.php
@@ -4,7 +4,7 @@
  * if you need to reuse the same set up pages, files or users in multiple places across your site.
  * 
  * More about collections:
- * http://getkirby.test/docs/guide/templates/collections
+ * https://getkirby.com/docs/guide/templates/collections
  */
 return function () {
     return page('notes')
diff --git a/site/controllers/notes.php b/site/controllers/notes.php
index 2063568..86696ac 100644
--- a/site/controllers/notes.php
+++ b/site/controllers/notes.php
@@ -11,12 +11,12 @@
  */
 return function ($page) {
 
-    $tag   = urldecode(param('tag'));
+    $tag   = urldecode(param('tag') ?? '');
     /**
      * We use the collection helper to fetch the notes collection defined in `/site/collections/notes.php`
      * 
      * More about collections:
-     * http://getkirby.test/docs/guide/templates/collections
+     * https://getkirby.com/docs/guide/templates/collections
      */
     $notes = collection('notes');
 
diff --git a/site/templates/about.php b/site/templates/about.php
index e15a092..f09fbf2 100644
--- a/site/templates/about.php
+++ b/site/templates/about.php
@@ -28,17 +28,17 @@
   <h2 class="h1">Get in contact</h2>
   <div class="grid" style="--gutter: 1.5rem">
     <section class="column text" style="--columns: 4">
-      <h3>Address</h2>
+      <h3>Address</h3>
       <?= $page->address()->kt() ?>
     </section>
     <section class="column text" style="--columns: 4">
-      <h3>Email</h2>
+      <h3>Email</h3>
       <p><?= html::email($page->email()) ?></p>
-      <h3>Phone</h2>
+      <h3>Phone</h3>
       <p><?= html::tel($page->phone()) ?></p>
     </section>
     <section class="column text" style="--columns: 4">
-      <h3>On the web</h2>
+      <h3>On the web</h3>
       <ul>
         <?php foreach ($page->social()->toStructure() as $social): ?>
         <li><?= html::a($social->url(), $social->platform()) ?></li>
@@ -48,6 +48,4 @@
   </div>
 </aside>
 
-</div>
-
 <?php snippet('footer') ?>