diff --git a/files_reader/ajax/personal.php b/files_reader/ajax/personal.php
index e18e2df..b2db6a8 100644
--- a/files_reader/ajax/personal.php
+++ b/files_reader/ajax/personal.php
@@ -12,8 +12,8 @@
 
 namespace OCA\Files_Reader;
 
-\OCP\JSON::callCheck();
-\OCP\JSON::checkLoggedIn();
+\OC_JSON::callCheck();
+\OC_JSON::checkLoggedIn();
 
 $l = \OC::$server->getL10N('files_reader');
 
@@ -21,11 +21,11 @@ $EpubEnable = isset($_POST['EpubEnable']) ? $_POST['EpubEnable'] : 'false';
 $PdfEnable = isset($_POST['PdfEnable']) ? $_POST['PdfEnable'] : 'false';
 $CbxEnable = isset($_POST['CbxEnable']) ? $_POST['CbxEnable'] : 'false';
 
-Config::set('epub_enable', $EpubEnable);
-Config::set('pdf_enable', $PdfEnable);
-Config::set('cbx_enable', $CbxEnable);
+\OC::$server->getAppConfig()->setValue('files_reader', 'epub_enable', $EpubEnable);
+\OC::$server->getAppConfig()->setValue('files_reader', 'pdf_enable', $PdfEnable);
+\OC::$server->getAppConfig()->setValue('files_reader', 'cbx_enable', $CbxEnable);
 
-\OCP\JSON::success(
+\OC_JSON::success(
     array(
 		'data' => array('message'=> $l->t('Settings updated successfully.'))
     )
diff --git a/files_reader/appinfo/info.xml b/files_reader/appinfo/info.xml
index 8319339..ec61ad1 100644
--- a/files_reader/appinfo/info.xml
+++ b/files_reader/appinfo/info.xml
@@ -52,7 +52,7 @@ See [README] for more exhaustive information on features and potential misfeatur
     </types>
     <dependencies>
         <owncloud min-version="8.2" max-version="10.0" />
-        <nextcloud min-version="8.1" max-version="13.0"/>
+        <nextcloud min-version="8.1" max-version="14.0"/>
 		<database>pgsql</database>
 		<database>sqlite</database>
 		<database>mysql</database>
diff --git a/files_reader/lib/Hooks.php b/files_reader/lib/Hooks.php
index 15025e2..3d3f1cb 100644
--- a/files_reader/lib/Hooks.php
+++ b/files_reader/lib/Hooks.php
@@ -19,7 +19,7 @@ use \OC\User\User as User;
 class Hooks {
 
     public static function register() {
-        Util::connectHook('\OCP\Config', 'js', 'OCA\Files_Reader\Hooks', 'announce_settings');
+        Util::connectHook('js', 'OCA\Files_Reader\Hooks', 'announce_settings');
 
         \OC::$server->getRootFolder()->listen('\OC\Files', 'preDelete', function (Node $node) {
             $fileId = $node->getId();
@@ -38,9 +38,9 @@ class Hooks {
         // TODO: rmeove this when Owncloud starts encoding oc_appconfig as JSON just like it already encodes most other properties
         $isJson = self::isJson($settings['array']['oc_appconfig']);
         $array = ($isJson) ? json_decode($settings['array']['oc_appconfig'], true) : $settings['array']['oc_appconfig'];
-        $array['filesReader']['enableEpub'] = Config::get('epub_enable', 'true');
-        $array['filesReader']['enablePdf'] = Config::get('pdf_enable', 'true');
-        $array['filesReader']['enableCbx'] = Config::get('cbx_enable', 'true');
+        $array['filesReader']['enableEpub'] = \OC::$server->getConfig()->getAppValue('epub_enable', 'true');
+        $array['filesReader']['enablePdf'] = \OC::$server->getConfig()->getAppValue('pdf_enable', 'true');
+        $array['filesReader']['enableCbx'] = \OC::$server->getConfig()->getAppValue('cbx_enable', 'true');
         $settings['array']['oc_appconfig'] = ($isJson) ? json_encode($array) : $array;
     }
 
diff --git a/files_reader/personal.php b/files_reader/personal.php
index 2b0dd18..6a071c5 100644
--- a/files_reader/personal.php
+++ b/files_reader/personal.php
@@ -15,9 +15,9 @@ use OCP\Util;
 #$l = \OC::$server->getL10N('files_reader');
 
 $tmpl = new \OCP\Template('files_reader', 'settings-personal');
-$EpubEnable = Config::get('epub_enable', 'true');
-$PdfEnable = Config::get('pdf_enable', 'true');
-$CbxEnable = Config::get('cbx_enable', 'true');
+$EpubEnable = \OC::$server->getConfig()->getAppValue('epub_enable', 'true');
+$PdfEnable = \OC::$server->getConfig()->getAppValue('pdf_enable', 'true');
+$CbxEnable = \OC::$server->getConfig()->getAppValue('cbx_enable', 'true');
 $tmpl->assign('EpubEnable', $EpubEnable);
 $tmpl->assign('PdfEnable', $PdfEnable);
 $tmpl->assign('CbxEnable', $CbxEnable);