diff --git a/.metadata b/.metadata
index aeb01ee..b603e3b 100644
--- a/.metadata
+++ b/.metadata
@@ -4,7 +4,27 @@
 # This file should be version controlled and should not be manually edited.
 
 version:
-  revision: 2d2a1ffec95cc70a3218872a2cd3f8de4933c42f
-  channel: stable
+  revision: "603104015dd692ea3403755b55d07813d5cf8965"
+  channel: "stable"
 
 project_type: app
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: 603104015dd692ea3403755b55d07813d5cf8965
+      base_revision: 603104015dd692ea3403755b55d07813d5cf8965
+    - platform: web
+      create_revision: 603104015dd692ea3403755b55d07813d5cf8965
+      base_revision: 603104015dd692ea3403755b55d07813d5cf8965
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'
diff --git a/web/index.html b/web/index.html
index 4d44ab8..7110aba 100644
--- a/web/index.html
+++ b/web/index.html
@@ -1,17 +1,7 @@
 <!DOCTYPE html>
 <html>
 <head>
-  <!--
-    If you are serving your web app in a path other than the root, change the
-    href value below to reflect the base path you are serving from.
-
-    The path provided below has to start and end with a slash "/" in order for
-    it to work correctly.
-
-    Fore more details:
-    * https://developer.mozilla.org/en-US/docs/Web/HTML/Element/base
-  -->
-  <base href="/">
+  <base href="$FLUTTER_BASE_HREF">
 
   <meta charset="UTF-8">
   <meta content="IE=Edge" http-equiv="X-UA-Compatible">
@@ -40,16 +30,6 @@ <h1>
       Welcome to Flutter Design Patterns! 👋
     </h1>
   </div>
-  <!-- This script installs service_worker.js to provide PWA functionality to
-       application. For more information, see:
-       https://developers.google.com/web/fundamentals/primers/service-workers -->
-  <script>
-    if ('serviceWorker' in navigator) {
-      window.addEventListener('flutter-first-frame', function () {
-        navigator.serviceWorker.register('flutter_service_worker.js');
-      });
-    }
-  </script>
-  <script src="main.dart.js" type="application/javascript"></script>
+  <script src="flutter_bootstrap.js" async></script>
 </body>
 </html>
diff --git a/web/manifest.json b/web/manifest.json
index 9316028..70365ec 100644
--- a/web/manifest.json
+++ b/web/manifest.json
@@ -18,6 +18,18 @@
       "src": "icons/Icon-512.png",
       "sizes": "512x512",
       "type": "image/png"
+    },
+    {
+      "src": "icons/Icon-maskable-192.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "purpose": "maskable"
+    },
+    {
+      "src": "icons/Icon-maskable-512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "maskable"
     }
   ]
 }
