diff --git a/db/upgrade.php b/db/upgrade.php
new file mode 100644
index 0000000..17335e3
--- /dev/null
+++ b/db/upgrade.php
@@ -0,0 +1,49 @@
+<?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/>.
+
+/**
+ * Capability definitions for the driprelease
+ *
+ * @package    tool_driprelease
+ * @copyright  2022 Marcus Green
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+/**
+ * Upgrade code for  tool_driprelease.
+ * @param int $oldversion the version we are upgrading from.
+ */
+function xmldb_tool_driprelease_upgrade($oldversion = 0) {
+    global $DB;
+
+    $dbman = $DB->get_manager();
+    if ($oldversion < 2023100300) {
+
+        // Define field coursegroup to be added to tool_driprelease.
+        $table = new xmldb_table('tool_driprelease');
+        $field = new xmldb_field('coursegroup', XMLDB_TYPE_CHAR, '50', null, null, null, null, 'sessionlength');
+
+        // Conditionally launch add field coursegroup.
+        if (!$dbman->field_exists($table, $field)) {
+            $dbman->add_field($table, $field);
+        }
+
+        // Driprelease savepoint reached.
+        upgrade_plugin_savepoint(true, 2023100300, 'tool', 'driprelease');
+    }
+
+    return true;
+}
\ No newline at end of file
diff --git a/version.php b/version.php
index 4234125..a05fde1 100644
--- a/version.php
+++ b/version.php
@@ -25,7 +25,7 @@
 defined('MOODLE_INTERNAL') || die();
 
 $plugin->component = 'tool_driprelease';
-$plugin->release = '0.2.0';
-$plugin->version = 2023021600;
+$plugin->release = '1.5.0';
+$plugin->version = 2023100300;
 $plugin->requires = 2020110900;
 $plugin->maturity = MATURITY_BETA;