diff --git a/edit_form.php b/edit_form.php
index 8fd0f8d..b634815 100755
--- a/edit_form.php
+++ b/edit_form.php
@@ -40,6 +40,9 @@ class block_timetable_edit_form extends block_edit_form {
         $mform->addElement('header', 'configheader', get_string('blocksettings', 'block'));
 
         // Please keep in mind that all elements defined here must start with 'config_'.
+        $mform->addElement('text', 'config_class', get_string('class', 'block_timetable'));
+        $mform->setDefault('config_class', '');
+        $mform->setType('config_class', PARAM_RAW);
 
     }
 }
diff --git a/lang/en/block_timetable.php b/lang/en/block_timetable.php
index 25780bf..6b14a68 100755
--- a/lang/en/block_timetable.php
+++ b/lang/en/block_timetable.php
@@ -28,3 +28,4 @@ defined('MOODLE_INTERNAL') || die();
 $string['pluginname'] = 'timetable';
 $string['timetable:addinstance'] = 'add timetable';
 $string['timetable:addmyinstance'] = 'add timetable';
+$string['class'] = 'class';
diff --git a/version.php b/version.php
index 57d2397..1bba05c 100755
--- a/version.php
+++ b/version.php
@@ -26,7 +26,7 @@ defined('MOODLE_INTERNAL') || die();
 
 $plugin->component = 'block_timetable';
 $plugin->release = '0.1.0';
-$plugin->version = 2020112101;
+$plugin->version = 2020120402;
 $plugin->requires = 2020061500;
 $plugin->maturity = MATURITY_ALPHA;
 $plugin->dependencies = [