diff --git a/public/service-worker.js b/public/service-worker.js
index e6f6ae0..165038b 100644
--- a/public/service-worker.js
+++ b/public/service-worker.js
@@ -1,18 +1,19 @@
-const CACHE_NAME = 'static-cache-v20';
+const CACHE_NAME = 'static-cache-v21';
 const FILES_TO_CACHE = [
   '/favicon.ico',
   '/offline.html',
-  '/static/v20/css/materialize.min.css',
-  '/static/v20/css/material-icons.css',
-  '/static/v20/css/local.css',
-  '/static/v20/fonts/MaterialIcons-Regular.woff2',
-  '/static/v20/fonts/MaterialIcons-Regular.woff',
-  '/static/v20/fonts/MaterialIcons-Regular.ttf',
-  '/static/v20/js/jquery-3.4.1.min.js',
-  '/static/v20/js/materialize.min.js',
-  '/static/v20/js/travelynx-actions.min.js',
-  '/static/v20/js/autocomplete.min.js',
-  '/static/v20/js/geolocation.min.js',
+  '/static/v21/css/light.min.css',
+  '/static/v21/css/dark.min.css',
+  '/static/v21/css/material-icons.css',
+  '/static/v21/css/local.css',
+  '/static/v21/fonts/MaterialIcons-Regular.woff2',
+  '/static/v21/fonts/MaterialIcons-Regular.woff',
+  '/static/v21/fonts/MaterialIcons-Regular.ttf',
+  '/static/v21/js/jquery-3.4.1.min.js',
+  '/static/v21/js/materialize.min.js',
+  '/static/v21/js/travelynx-actions.min.js',
+  '/static/v21/js/autocomplete.min.js',
+  '/static/v21/js/geolocation.min.js',
 ];
 
 self.addEventListener('install', (evt) => {
diff --git a/public/static/css/material-icons.css b/public/static/css/material-icons.css
index c46f5be..9ac35e7 100644
--- a/public/static/css/material-icons.css
+++ b/public/static/css/material-icons.css
@@ -2,12 +2,12 @@
   font-family: 'Material Icons';
   font-style: normal;
   font-weight: 400;
-  src: url(/static/v20/fonts/MaterialIcons-Regular.eot); /* For IE6-8 */
+  src: url(/static/v21/fonts/MaterialIcons-Regular.eot); /* For IE6-8 */
   src: local('Material Icons'),
        local('MaterialIcons-Regular'),
-       url(/static/v20/fonts/MaterialIcons-Regular.woff2) format('woff2'),
-       url(/static/v20/fonts/MaterialIcons-Regular.woff) format('woff'),
-       url(/static/v20/fonts/MaterialIcons-Regular.ttf) format('truetype');
+       url(/static/v21/fonts/MaterialIcons-Regular.woff2) format('woff2'),
+       url(/static/v21/fonts/MaterialIcons-Regular.woff) format('woff'),
+       url(/static/v21/fonts/MaterialIcons-Regular.ttf) format('truetype');
 }
 
 .material-icons {
diff --git a/public/static/manifest.json b/public/static/manifest.json
index 1d35741..6ac81dc 100644
--- a/public/static/manifest.json
+++ b/public/static/manifest.json
@@ -3,27 +3,27 @@
   "short_name": "Travelynx",
   "scope": "/",
   "icons": [{
-    "src": "/static/v20/icons/icon-128x128.png",
+    "src": "/static/v21/icons/icon-128x128.png",
       "sizes": "128x128",
       "type": "image/png"
     }, {
-      "src": "/static/v20/icons/icon-144x144.png",
+      "src": "/static/v21/icons/icon-144x144.png",
       "sizes": "144x144",
       "type": "image/png"
     }, {
-      "src": "/static/v20/icons/icon-152x152.png",
+      "src": "/static/v21/icons/icon-152x152.png",
       "sizes": "152x152",
       "type": "image/png"
     }, {
-      "src": "/static/v20/icons/icon-192x192.png",
+      "src": "/static/v21/icons/icon-192x192.png",
       "sizes": "192x192",
       "type": "image/png"
     }, {
-      "src": "/static/v20/icons/icon-256x256.png",
+      "src": "/static/v21/icons/icon-256x256.png",
       "sizes": "256x256",
       "type": "image/png"
     }, {
-      "src": "/static/v20/icons/icon-512x512.png",
+      "src": "/static/v21/icons/icon-512x512.png",
       "sizes": "512x512",
       "type": "image/png"
     }],
diff --git a/public/static/v19 b/public/static/v21
similarity index 100%
rename from public/static/v19
rename to public/static/v21
diff --git a/templates/layouts/default.html.ep b/templates/layouts/default.html.ep
index 00d446a..76c130b 100644
--- a/templates/layouts/default.html.ep
+++ b/templates/layouts/default.html.ep
@@ -9,7 +9,7 @@
 	<meta name="apple-mobile-web-app-capable" content="yes">
 	<meta name="apple-mobile-web-app-status-bar-style" content="black">
 	<meta name="apple-mobile-web-app-title" content="Travelynx">
-	% my $av = 'v20'; # asset version
+	% my $av = 'v21'; # asset version
 	<link rel="icon" type="image/png" href="/static/<%= $av %>/icons/icon-16x16.png" sizes="16x16">
 	<link rel="icon" type="image/png" href="/static/<%= $av %>/icons/icon-32x32.png" sizes="32x32">
 	<link rel="icon" type="image/png" href="/static/<%= $av %>/icons/icon-96x96.png" sizes="96x96">