diff --git a/backup/moodle2/backup_plagiarism_pchkorg_plugin.class.php b/backup/moodle2/backup_plagiarism_pchkorg_plugin.class.php
index 704b45a..9b4eecd 100644
--- a/backup/moodle2/backup_plagiarism_pchkorg_plugin.class.php
+++ b/backup/moodle2/backup_plagiarism_pchkorg_plugin.class.php
@@ -34,19 +34,19 @@ class backup_plagiarism_pchkorg_plugin extends backup_plagiarism_plugin {
         $plugin->add_child($pluginwrapper);
 
         $configs = new backup_nested_element('pchkorg_activities_configs');
-        $config = new backup_nested_element('pchkorg_activities_config', ['id'], ['name', 'value']);
+        $config = new backup_nested_element('pchkorg_activities_config', array('id'), array('name', 'value'));
         $pluginwrapper->add_child($configs);
         $configs->add_child($config);
-        $config->set_source_table('plagiarism_pchkorg_config', ['cm' => backup::VAR_PARENTID]);
+        $config->set_source_table('plagiarism_pchkorg_config', array('cm' => backup::VAR_PARENTID));
 
         // Now information about files to module.
         $files = new backup_nested_element('pchkorg_files');
-        $file = new backup_nested_element('pchkorg_file', ['id'], [
+        $file = new backup_nested_element('pchkorg_file', array('id'), array(
             'cm', 'fileid', 'userid', 
             'state', 'score', 'created_at', 
             'textid', 'reportid', 'signature', 
             'attempt', 'itemid'
-        ]);
+        ));
 
         $pluginwrapper->add_child($files);
         $files->add_child($file);
@@ -54,7 +54,7 @@ class backup_plagiarism_pchkorg_plugin extends backup_plagiarism_plugin {
         // To know if we are including userinfo.
         $userinfo = $this->get_setting_value('userinfo');
         if ($userinfo) {
-            $file->set_source_table('plagiarism_pchkorg_files', ['cm' => backup::VAR_PARENTID]);
+            $file->set_source_table('plagiarism_pchkorg_files', array('cm' => backup::VAR_PARENTID));
         }
 
         return $plugin;
@@ -71,12 +71,12 @@ class backup_plagiarism_pchkorg_plugin extends backup_plagiarism_plugin {
         $plugin->add_child($pluginwrapper);
 
         $configs = new backup_nested_element('pchkorg_configs');
-        $config = new backup_nested_element('pchkorg_config', ['id'], ['plugin', 'name', 'value']);
+        $config = new backup_nested_element('pchkorg_config', array('id'), array('plugin', 'name', 'value'));
         $pluginwrapper->add_child($configs);
         $configs->add_child($config);
-        $config->set_source_table('config_plugins', [
+        $config->set_source_table('config_plugins', array(
             'name' => backup::VAR_PARENTID, 'plugin' => backup_helper::is_sqlparam('plagiarism'),
-        ]);
+        ));
 
         return $plugin;
     }
diff --git a/backup/moodle2/restore_plagiarism_pchkorg_plugin.class.php b/backup/moodle2/restore_plagiarism_pchkorg_plugin.class.php
index 36e4fe7..64027e0 100644
--- a/backup/moodle2/restore_plagiarism_pchkorg_plugin.class.php
+++ b/backup/moodle2/restore_plagiarism_pchkorg_plugin.class.php
@@ -47,7 +47,7 @@ class restore_plagiarism_pchkorg_plugin extends restore_plagiarism_plugin {
 
 
     protected function define_course_plugin_structure() {
-        $paths = [];
+        $paths = array();
 
         $elename = 'pchkorg_config';
         $elepath = $this->get_pathfor('/pchkorg_configs/pchkorg_config'); 
@@ -59,7 +59,7 @@ class restore_plagiarism_pchkorg_plugin extends restore_plagiarism_plugin {
 
 
     protected function define_module_plugin_structure() {
-        $paths = [];
+        $paths = array();
 
         $elename = 'pchkorgconfigmod';
         $elepath = $this->get_pathfor('/pchkorg_activities_configs/pchkorg_activities_config');
diff --git a/classes/plagiarism_pchkorg_api_provider.php b/classes/plagiarism_pchkorg_api_provider.php
index 8a71af4..35837f3 100644
--- a/classes/plagiarism_pchkorg_api_provider.php
+++ b/classes/plagiarism_pchkorg_api_provider.php
@@ -177,7 +177,7 @@ class plagiarism_pchkorg_api_provider {
                         $content,
                         $mime,
                         $filename,
-                        $filters,
+                        $filters
                 ),
                 array(
                         'CURLOPT_RETURNTRANSFER' => true,
@@ -299,7 +299,7 @@ class plagiarism_pchkorg_api_provider {
                     $content,
                     $mime,
                     $filename,
-                    $filters,
+                    $filters
                 ),
                 array(
                         'CURLOPT_RETURNTRANSFER' => true,
diff --git a/lib.php b/lib.php
index f8e80a4..9bef634 100644
--- a/lib.php
+++ b/lib.php
@@ -66,7 +66,7 @@ function plagiarism_pchkorg_coursemodule_standard_elements($formwrapper, $mform)
         $defaultcmid = null;
         $cm = optional_param('update', $defaultcmid, PARAM_INT);
         $minpercent = $pchkorgconfigmodel->get_system_config('pchkorg_min_percent');
-        $exportedvalues = $mform->exportValues([]);
+        $exportedvalues = $mform->exportValues(array());
         if (!is_array($exportedvalues)) {
             $exportedvalues = array();
         }
@@ -324,7 +324,7 @@ class plagiarism_plugin_pchkorg extends plagiarism_plugin {
             );
         }
         $roleDatas = get_user_roles($context, $USER->id, true);
-        $roles = [];
+        $roles = array();
         foreach ($roleDatas as $rolesData) {
             $roles[] = strtolower($rolesData->shortname);
         }
@@ -738,7 +738,7 @@ display: inline-block;"
             if ($ismemberresponse->is_auto_registration_enabled) {
                 $name = $USER->firstname . ' ' . $USER->lastname;
                 $roleDatas = get_user_roles($context, $USER->id, true);
-                $roles = [];
+                $roles = array();
                 foreach ($roleDatas as $rolesData) {
                     $roles[] = strtolower($rolesData->shortname);
                 }
@@ -1099,7 +1099,7 @@ display: inline-block;"
                 } else {
                     $minpercent = $systemminpercent;
                 }
-                $filters = [
+                $filters = array(
                     'include_references' => $pchkorgconfigmodel->get_filter_for_module(
                         $cm->id,
                         'pchkorg_include_referenced'
@@ -1112,7 +1112,7 @@ display: inline-block;"
                         $cm->id,
                         'pchkorg_exclude_self_plagiarism'
                     ),
-                ];
+                );
                 if ($minpercent) {
                     $filters['source_min_percent'] = $minpercent;
                 }
@@ -1153,7 +1153,7 @@ display: inline-block;"
                                     html_to_text($content, 75, false),
                                     'plain/text',
                                     sprintf('%s-quiz.txt', $filedb->itemid),
-                                    $filters,
+                                    $filters
                                 );
                                 break;
                             }
@@ -1222,7 +1222,7 @@ display: inline-block;"
                                     html_to_text($content, 75, false),
                                     'plain/text',
                                     sprintf('%s-quiz.txt', $filedb->itemid),
-                                    $filters,
+                                    $filters
                                 );
                             }
                         }
@@ -1280,7 +1280,7 @@ display: inline-block;"
                                 html_to_text($content, 75, false),
                                 'plain/text',
                                 sprintf('%s-submussion.txt', $moodletextsubmission->id),
-                                $filters,
+                                $filters
                             );
                         }
                     } else {
diff --git a/version.php b/version.php
index 61d977a..937633c 100644
--- a/version.php
+++ b/version.php
@@ -26,9 +26,9 @@ defined('MOODLE_INTERNAL') || die();
 if (!isset($plugin)) {
     $plugin = new stdClass();
 }
-$plugin->version = 2022110716;
+$plugin->version = 2022111616;
 $plugin->requires = 2020061501; // Requires Moodle 3.9 .
-$plugin->release = 'v3.13.2';
+$plugin->release = 'v3.13.3';
 $plugin->component = 'plagiarism_pchkorg';
 $plugin->maturity = MATURITY_STABLE;
 $plugin->dependencies = array(