diff --git a/db/install.xml b/db/install.xml
index 99a6467..3842add 100644
--- a/db/install.xml
+++ b/db/install.xml
@@ -37,7 +37,7 @@
-
+
diff --git a/db/upgrade.php b/db/upgrade.php
index d00522f..e774665 100644
--- a/db/upgrade.php
+++ b/db/upgrade.php
@@ -237,7 +237,7 @@ function xmldb_attendance_upgrade($oldversion=0) {
$table = new xmldb_table('attendance_sessions');
$field = new xmldb_field('studentpassword');
- $field->set_attributes(XMLDB_TYPE_CHAR, '50', null, null, null, '', 'studentscanmark');
+ $field->set_attributes(XMLDB_TYPE_CHAR, '50', null, false, null, '', 'studentscanmark');
if (!$dbman->field_exists($table, $field)) {
$dbman->add_field($table, $field);
}