diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2c4aa35..88db257 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## [0.6.4]: 2021-03-18
+- Initial Nextcloud 21 support.
+- Add new api for uploading attachments. For now only used in the Android
+  client.
+- Update Portuguese (Brazil) thanks to flaviove.
+
 ## [0.6.3]: 2020-10-31
 - Fix thumbnail when pretty url is disabled. Issue #48
 - Update French translation thanks to Thovi98
diff --git a/appinfo/app.php b/appinfo/app.php
deleted file mode 100644
index 211c992..0000000
--- a/appinfo/app.php
+++ /dev/null
@@ -1,26 +0,0 @@
-<?php
-/*
- * @copyright 2016-2020 Matias De lellis <mati86dl@gmail.com>
- *
- * @author 2016 Matias De lellis <mati86dl@gmail.com>
- *
- * @license GNU AGPL version 3 or any later version
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-use OCA\QuickNotes\AppInfo\Application;
-
-$app = new Application();
-$app->register();
\ No newline at end of file
diff --git a/appinfo/info.xml b/appinfo/info.xml
index 2aed82a..0d4ec6d 100644
--- a/appinfo/info.xml
+++ b/appinfo/info.xml
@@ -5,7 +5,7 @@
     <name>Quick notes</name>
     <summary>Quick notes with a basic rich text</summary>
     <description>Quick notes with a basic rich text</description>
-    <version>0.6.3</version>
+    <version>0.6.4</version>
     <licence>agpl</licence>
     <author>Matias De lellis</author>
     <namespace>QuickNotes</namespace>
@@ -20,6 +20,6 @@
     <screenshot>https://raw.githubusercontent.com/matiasdelellis/quicknotes/master/doc/quicknotes-attachments.jpeg</screenshot>
     <screenshot>https://raw.githubusercontent.com/matiasdelellis/quicknotes/master/doc/quicknotes-shared-note.jpeg</screenshot>
     <dependencies>
-        <nextcloud min-version="18" max-version="20"/>
+        <nextcloud min-version="20" max-version="20"/>
     </dependencies>
 </info>
diff --git a/lib/AppInfo/Application.php b/lib/AppInfo/Application.php
index 719d758..fae1df2 100644
--- a/lib/AppInfo/Application.php
+++ b/lib/AppInfo/Application.php
@@ -1,6 +1,6 @@
 <?php declare(strict_types=1);
 /*
- * @copyright 2016-2020 Matias De lellis <mati86dl@gmail.com>
+ * @copyright 2016-2021 Matias De lellis <mati86dl@gmail.com>
  *
  * @author 2016 Matias De lellis <mati86dl@gmail.com>
  *
@@ -23,13 +23,16 @@
 namespace OCA\QuickNotes\AppInfo;
 
 use OCP\AppFramework\App;
+use OCP\AppFramework\Bootstrap\IBootstrap;
+use OCP\AppFramework\Bootstrap\IBootContext;
+use OCP\AppFramework\Bootstrap\IRegistrationContext;
 
 use OCP\IL10N;
 use OCP\IURLGenerator;
 use OCP\IServerContainer;
 
 
-class Application extends App {
+class Application extends App implements IBootstrap {
 
 	/** @var string */
 	public const APP_ID = 'quicknotes';
@@ -41,31 +44,27 @@ class Application extends App {
 		parent::__construct(self::APP_ID, $urlParams);
 	}
 
-	public function register(): void {
-		$this->registerNavigationEntry();
-		$this->registerCapabilities();
+	public function register(IRegistrationContext $context): void {
+		$context->registerCapability(Capabilities::class);
 	}
 
-	private function registerNavigationEntry(): void {
-		$container = $this->getContainer();
-		$server = $container->getServer();
+	public function boot(IBootContext $context): void {
+		$server = $context->getServerContainer();
+		$this->registerNavigationEntry($server);
+	}
 
-		$server->getNavigationManager()->add(static function () use ($container) {
-			$urlGenerator = $container->query(IURLGenerator::class);
-			$l10n = $container->query(IL10N::class);
+	private function registerNavigationEntry(IServerContainer $server): void {
+		$server->getNavigationManager()->add(static function () use ($server) {
+			$urlGenerator = $server->getURLGenerator();
+			$l10n = $server->getL10N(self::APP_ID);
 			return [
-				'id' => 'quicknotes',
+				'id' => self::APP_ID,
 				'order' => 10,
 				'href' => $urlGenerator->linkToRoute('quicknotes.page.index'),
-				'icon' => $urlGenerator->imagePath('quicknotes', 'app.svg'),
-				'name' => $l10n->t('Quick notes'),
+				'icon' => $urlGenerator->imagePath(self::APP_ID, 'app.svg'),
+				'name' => $l10n->t('Quick notes')
 			];
 		});
 	}
 
-	private function registerCapabilities(): void {
-		$container = $this->getContainer();
-		$container->registerCapability(Capabilities::class);
-	}
-
 }
\ No newline at end of file