diff --git a/lib.php b/lib.php
index 9bef634..971196e 100644
--- a/lib.php
+++ b/lib.php
@@ -329,8 +329,7 @@ class plagiarism_plugin_pchkorg extends plagiarism_plugin {
             $roles[] = strtolower($rolesData->shortname);
         }
         // Moodle has multiple roles in courses.
-        $isstudent = in_array('student', $roles)
-            && !in_array('teacher', $roles)
+        $isstudent = !in_array('teacher', $roles)
             && !in_array('editingteacher', $roles)
             && !in_array('managerteacher', $roles);
 
diff --git a/version.php b/version.php
index 937633c..990e585 100644
--- a/version.php
+++ b/version.php
@@ -26,9 +26,9 @@ defined('MOODLE_INTERNAL') || die();
 if (!isset($plugin)) {
     $plugin = new stdClass();
 }
-$plugin->version = 2022111616;
+$plugin->version = 2023050117;
 $plugin->requires = 2020061501; // Requires Moodle 3.9 .
-$plugin->release = 'v3.13.3';
+$plugin->release = 'v3.13.4';
 $plugin->component = 'plagiarism_pchkorg';
 $plugin->maturity = MATURITY_STABLE;
 $plugin->dependencies = array(