diff --git a/drawio/appinfo/app.php b/drawio/appinfo/app.php
index e9a211b..c47dd18 100644
--- a/drawio/appinfo/app.php
+++ b/drawio/appinfo/app.php
@@ -11,6 +11,4 @@
 
 namespace OCA\Drawio\AppInfo;
 
-use OCP\App;
-
 $app = new Application();
diff --git a/drawio/appinfo/info.xml b/drawio/appinfo/info.xml
index 0eefab5..49e8151 100644
--- a/drawio/appinfo/info.xml
+++ b/drawio/appinfo/info.xml
@@ -1,26 +1,26 @@
 <?xml version="1.0"?>
-<info>
+<info xmlns:xsi= "http://www.w3.org/2001/XMLSchema-instance"
+	  xsi:noNamespaceSchemaLocation="https://apps.nextcloud.com/schema/apps/info.xsd">
     <id>drawio</id>
     <name>Draw.io</name>
     <summary>Draw.io integration app</summary>
-    <description><![CDATA[Integrates Draw.io with Nextcloud]]></description>
-    <licence>AGPL</licence>
+    <description>Integrates Draw.io with Nextcloud</description>
+    <version>0.9.8</version>
+    <licence>agpl</licence>
     <author>Paweł Rojek</author>
-    <version>0.9.7</version>
     <namespace>Drawio</namespace>
     <types>
-        <filesystem/>
+        <filesystem />
     </types>
     <category>files</category>
     <category>integration</category>
     <category>tools</category>
     <website>https://github.com/pawelrojek/nextcloud-drawio/</website>
-    <screenshot small-thumbnail="https://raw.githubusercontent.com/pawelrojek/nextcloud-drawio/master/screenshots/drawio_integration_sm.png">https://raw.githubusercontent.com/pawelrojek/nextcloud-drawio/master/screenshots/drawio_integration.png</screenshot>
     <bugs>https://github.com/pawelrojek/nextcloud-drawio/issues</bugs>
     <repository type="git">https://github.com/pawelrojek/nextcloud-drawio.git</repository>
+    <screenshot small-thumbnail="https://raw.githubusercontent.com/pawelrojek/nextcloud-drawio/master/screenshots/drawio_integration_sm.png">https://raw.githubusercontent.com/pawelrojek/nextcloud-drawio/master/screenshots/drawio_integration.png</screenshot>
     <dependencies>
-        <nextcloud min-version="11" max-version="19"/>
-        <owncloud min-version="10.0" max-version="10.1" />
+        <nextcloud min-version="11" max-version="20"/>
     </dependencies>
     <settings>
         <admin>OCA\Drawio\AdminSettings</admin>
diff --git a/drawio/controller/editorcontroller.php b/drawio/controller/editorcontroller.php
index 85ca4f7..1697a7f 100644
--- a/drawio/controller/editorcontroller.php
+++ b/drawio/controller/editorcontroller.php
@@ -11,7 +11,6 @@
 
 namespace OCA\Drawio\Controller;
 
-use OCP\App;
 use OCP\AppFramework\Http\TemplateResponse;
 use OCP\AppFramework\Http\ContentSecurityPolicy;
 use OCP\AppFramework\Controller;
@@ -94,7 +93,7 @@ public function index($fileId) {
         $lang = $this->config->GetLang();
         $lang = trim(strtolower($lang));
 
-        if ($lang=="auto")
+        if ("auto" === $lang)
         {
             $lang = \OC::$server->getL10NFactory("")->get("")->getLanguageCode();
         }
diff --git a/drawio/l10n/it.json b/drawio/l10n/it.json
index ca2e66a..601f79a 100644
--- a/drawio/l10n/it.json
+++ b/drawio/l10n/it.json
@@ -10,7 +10,7 @@
   "Yes" : "Si",
   "No" : "No",
   "Associate XML files with Draw.io?" : "Associa i file XML a Draw.io?",
-  "Please note: when you disable the XML association, you need to manually register the MIME type application/x-drawio for the extension \".drawio\"." : "Nota: quando si disabilita l'associazione XML, è necessario registrare manualmente il tipo MIME application / x-drawio per l'estensione \".Drawio\".”,
+  "Please note: when you disable the XML association, you need to manually register the MIME type application/x-drawio for the extension \".drawio\"." : "Nota: quando si disabilita l'associazione XML, è necessario registrare manualmente il tipo MIME application / x-drawio per l'estensione \".Drawio\".",
   "Kennedy" : "Kennedy",
   "Minimal" : "Minimale",
   "Atlas" : "Atlas",
diff --git a/drawio/settings.php b/drawio/settings.php
index 94f868d..728f314 100644
--- a/drawio/settings.php
+++ b/drawio/settings.php
@@ -2,8 +2,6 @@
 
 namespace OCA\Drawio;
 
-use OCP\User;
-
 use OCA\Drawio\AppInfo\Application;
 
 
diff --git a/drawio/templates/editor.php b/drawio/templates/editor.php
index 00d0959..f416ac1 100644
--- a/drawio/templates/editor.php
+++ b/drawio/templates/editor.php
@@ -3,7 +3,7 @@
     script("drawio", "editor");
 
     $frame_params = "?embed=1";
-    if ($_["drawioOfflineMode"] == "yes")
+    if ($_["drawioOfflineMode"] === "yes")
     {
         $frame_params .= "&offline=1&stealth=1";
     }
diff --git a/drawio/templates/settings.php b/drawio/templates/settings.php
index b482e23..17a43a8 100644
--- a/drawio/templates/settings.php
+++ b/drawio/templates/settings.php
@@ -11,10 +11,10 @@
     <p class="drawio-header">
     <label for='theme'><?php p($l->t("Theme:")) ?></label>
     <select id="theme">
-      <option value="kennedy"<?php if ($_["drawioTheme"]=="kennedy") echo ' selected'; ?>><?php p($l->t("Kennedy")) ?></option>
-      <option value="minimal"<?php if ($_["drawioTheme"]=="minimal") echo ' selected'; ?>><?php p($l->t("Minimal")) ?></option>
-      <option value="atlas"<?php if ($_["drawioTheme"]=="atlas") echo ' selected'; ?>><?php p($l->t("Atlas")) ?></option>
-      <option value="dark"<?php if ($_["drawioTheme"]=="dark") echo ' selected'; ?>><?php p($l->t("Dark")) ?></option>
+      <option value="kennedy"<?php if ($_["drawioTheme"] === "kennedy") echo ' selected'; ?>><?php p($l->t("Kennedy")) ?></option>
+      <option value="minimal"<?php if ($_["drawioTheme"] === "minimal") echo ' selected'; ?>><?php p($l->t("Minimal")) ?></option>
+      <option value="atlas"<?php if ($_["drawioTheme"] === "atlas") echo ' selected'; ?>><?php p($l->t("Atlas")) ?></option>
+      <option value="dark"<?php if ($_["drawioTheme"] === "dark") echo ' selected'; ?>><?php p($l->t("Dark")) ?></option>
     </select>
     </p>
 
@@ -26,8 +26,8 @@
     <p class="drawio-header">
     <label for='overrideXml'><?php p($l->t("Associate XML files with Draw.io?")) ?>
     <select id="overrideXml">
-      <option value="yes"<?php if ($_["drawioOverrideXml"]=="yes") echo ' selected'; ?>><?php p($l->t("Yes")) ?></option>
-      <option value="no"<?php if ($_["drawioOverrideXml"]=="no") echo ' selected'; ?>><?php p($l->t("No")) ?></option>
+      <option value="yes"<?php if ($_["drawioOverrideXml"] === "yes") echo ' selected'; ?>><?php p($l->t("Yes")) ?></option>
+      <option value="no"<?php if ($_["drawioOverrideXml"] === "no") echo ' selected'; ?>><?php p($l->t("No")) ?></option>
     </select>
     </p>
 
@@ -36,8 +36,8 @@
     <p class="drawio-header">
     <label for='offlineMode'><?php p($l->t("Activate offline mode in Draw.io?")) ?>
     <select id="offlineMode">
-      <option value="yes"<?php if ($_["drawioOfflineMode"]=="yes") echo ' selected'; ?>><?php p($l->t("Yes")) ?></option>
-      <option value="no"<?php if ($_["drawioOfflineMode"]=="no") echo ' selected'; ?>><?php p($l->t("No")) ?></option>
+      <option value="yes"<?php if ($_["drawioOfflineMode"] === "yes") echo ' selected'; ?>><?php p($l->t("Yes")) ?></option>
+      <option value="no"<?php if ($_["drawioOfflineMode"] === "no") echo ' selected'; ?>><?php p($l->t("No")) ?></option>
     </select>
     </p>
 
@@ -46,8 +46,8 @@
     <p class="drawio-header">
         <label for='drawioAutosave'><?php p($l->t("Activate autosave?")) ?>
             <select id="drawioAutosave">
-                <option value="yes"<?php if ($_["drawioAutosave"]=="yes") echo ' selected'; ?>><?php p($l->t("Yes")) ?></option>
-                <option value="no"<?php if ($_["drawioAutosave"]=="no") echo ' selected'; ?>><?php p($l->t("No")) ?></option>
+                <option value="yes"<?php if ($_["drawioAutosave"] === "yes") echo ' selected'; ?>><?php p($l->t("Yes")) ?></option>
+                <option value="no"<?php if ($_["drawioAutosave"] === "no") echo ' selected'; ?>><?php p($l->t("No")) ?></option>
             </select>
     </p>