diff --git a/classes/permissions/capability.class.php b/classes/permissions/capability.class.php
new file mode 100644
index 0000000..7fb3ec9
--- /dev/null
+++ b/classes/permissions/capability.class.php
@@ -0,0 +1,44 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * @package   plagiarism_pchkorg
+ * @category  plagiarism
+ * @copyright PlagiarismCheck.org, https://plagiarismcheck.org/
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+namespace plagiarism_pchkorg\classes\permissions;
+
+use context_course;
+use context_module;
+
+if (!defined('MOODLE_INTERNAL')) {
+    die('Direct access to this script is forbidden.'); // It must be included from a Moodle page.
+}
+
+class capability
+{
+
+    /**
+     * ENABLE
+     */
+    const ENABLE = 'plagiarism/pchkorg:enable';
+    /**
+     * VIEW_SIMILARITY
+     */
+    const VIEW_SIMILARITY = 'plagiarism/pchkorg:viewsimilarity';
+}
diff --git a/db/access.php b/db/access.php
new file mode 100644
index 0000000..9152089
--- /dev/null
+++ b/db/access.php
@@ -0,0 +1,48 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+/**
+ * @package   plagiarism_pchkorg
+ * @category  plagiarism
+ * @copyright PlagiarismCheck.org, https://plagiarismcheck.org/
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+if (!defined('MOODLE_INTERNAL')) {
+    die('Direct access to this script is forbidden.');
+}
+
+$capabilities = array(
+    'plagiarism/pchkorg:enable' => array(
+        'captype' => 'write',
+        'contextlevel' => CONTEXT_MODULE,
+        'archetypes' => array(
+            'editingteacher' => CAP_ALLOW,
+            'teacher'        => CAP_ALLOW,
+            'manager'        => CAP_ALLOW,
+            'coursecreator'  => CAP_ALLOW
+        ),
+    ),
+    'plagiarism/pchkorg:viewsimilarity' => array(
+        'captype' => 'write',
+        'contextlevel' => CONTEXT_MODULE,
+        'archetypes' => array(
+            'editingteacher' => CAP_ALLOW,
+            'teacher'        => CAP_ALLOW,
+            'manager'        => CAP_ALLOW,
+            'student'        => CAP_ALLOW,
+            'coursecreator'  => CAP_ALLOW
+        ),
+    ),
+);
diff --git a/db/upgrade.php b/db/upgrade.php
index 6167b57..3d1890e 100644
--- a/db/upgrade.php
+++ b/db/upgrade.php
@@ -56,4 +56,6 @@ function xmldb_plagiarism_pchkorg_upgrade($oldversion) {
 
         upgrade_plugin_savepoint(true, 2021072801, 'plagiarism', 'pchkorg');
     }
+
+    return true;
 }
diff --git a/lang/en/plagiarism_pchkorg.php b/lang/en/plagiarism_pchkorg.php
index 973ea5d..e7adfbf 100644
--- a/lang/en/plagiarism_pchkorg.php
+++ b/lang/en/plagiarism_pchkorg.php
@@ -57,7 +57,6 @@ $string['privacy:metadata:plagiarism_pchkorg_config'] = 'Table with module setti
 $string['privacy:metadata:plagiarism_pchkorg_config:cm'] = 'Course module identity';
 $string['privacy:metadata:plagiarism_pchkorg_config:name'] = 'Name of option';
 $string['privacy:metadata:plagiarism_pchkorg_config:value'] = 'Value of option';
-
 $string['privacy:metadata:plagiarism_pchkorg'] = 'Service for originality check plagiarismcheck.org';
 $string['privacy:metadata:plagiarism_pchkorg:file'] =
         'Submission attachment for originality checkprivacy:metadata:plagiarism_pchkorg';
@@ -69,3 +68,5 @@ $string['pchkorg_label_title'] = 'PlagiarismCheck.org ID: %s; Similarity Score:
 $string['pchkorg_label_result'] = 'ID: %s Similarity: %s%%';
 $string['pchkorg_label_sent'] = 'ID: %s Sent';
 $string['pchkorg_label_queued'] = 'In queue';
+$string['pchkorg:enable'] = 'Allow to enable/disable PlagiarismCheck.org inside an activity';
+$string['pchkorg:viewsimilarity'] = 'Allow to view similarity value from PlagiarismCheck.org';
diff --git a/lib.php b/lib.php
index e1f7fff..dc3f2e8 100644
--- a/lib.php
+++ b/lib.php
@@ -30,6 +30,9 @@ require_once($CFG->libdir . '/filelib.php');
 require_once($CFG->libdir . '/accesslib.php');
 require_once(__DIR__ . '/classes/plagiarism_pchkorg_config_model.php');
 require_once(__DIR__ . '/classes/plagiarism_pchkorg_api_provider.php');
+require_once(__DIR__ . '/classes/permissions/capability.class.php');
+
+use plagiarism_pchkorg\classes\permissions\capability;
 
 /**
  * Class plagiarism_plugin_pchkorg
@@ -74,6 +77,11 @@ class plagiarism_plugin_pchkorg extends plagiarism_plugin {
             $context = context_module::instance($cmid);// Get context of course.
         }
 
+        $canview = has_capability(capability::VIEW_SIMILARITY, $context);
+        if (!$canview) {
+            return '';
+        }
+
         // SQL will be called only once per page. There is static result inside.
         if (!$pchkorgconfigmodel->is_enabled_for_module($cmid)) {
             return '';
@@ -195,9 +203,9 @@ display: inline-block;"
 
         $config = $pchkorgconfigmodel->get_system_config('pchkorg_use');
         if ('1' != $config) {
-
             return;
         }
+
         if (!isset($data->pchkorg_module_use)) {
             return;
         }
@@ -239,7 +247,9 @@ display: inline-block;"
         $pchkorgconfigmodel = new plagiarism_pchkorg_config_model();
 
         $config = $pchkorgconfigmodel->get_system_config('pchkorg_use');
-        if ('1' == $config) {
+        $enabled = has_capability(capability::ENABLE, $context);
+
+        if ('1' == $config && $enabled) {
             $defaultcmid = null;
             $cm = optional_param('update', $defaultcmid, PARAM_INT);
             if (null !== $cm) {
diff --git a/version.php b/version.php
index 8d6fb29..86f3fde 100644
--- a/version.php
+++ b/version.php
@@ -26,9 +26,9 @@ defined('MOODLE_INTERNAL') || die();
 if (!isset($plugin)) {
     $plugin = new stdClass();
 }
-$plugin->version = 2021072801;
+$plugin->version = 2021092804;
 $plugin->requires = 2017051500; // Requires Moodle 3.3 .
-$plugin->release = 'v3.6.2';
+$plugin->release = 'v3.7.4';
 $plugin->maturity = MATURITY_STABLE;
 $plugin->component = 'plagiarism_pchkorg';
 $plugin->dependencies = array(