diff --git a/build/build.xml b/build/build.xml
index 9f233f78b7..a2571d50f5 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -3,8 +3,8 @@
 <project name="phpBB" description="The phpBB forum software" default="all" basedir="../">
 	<!-- a few settings for the build -->
 	<property name="newversion" value="4.0.0-a1-dev" />
-	<property name="prevversion" value="3.3.1" />
-	<property name="olderversions" value="3.1.0, 3.1.1, 3.1.2, 3.1.3, 3.1.4, 3.1.5, 3.1.6, 3.1.7, 3.1.7-pl1, 3.1.8, 3.1.9, 3.1.10, 3.1.11, 3.1.12, 3.2.0, 3.2.1, 3.2.2, 3.2.3, 3.2.4, 3.2.5, 3.2.6, 3.2.7, 3.2.8, 3.2.9, 3.2.10, 3.2.11, 3.3.0, 3.3.2-RC1" />
+	<property name="prevversion" value="3.3.2" />
+	<property name="olderversions" value="3.1.0, 3.1.1, 3.1.2, 3.1.3, 3.1.4, 3.1.5, 3.1.6, 3.1.7, 3.1.7-pl1, 3.1.8, 3.1.9, 3.1.10, 3.1.11, 3.1.12, 3.2.0, 3.2.1, 3.2.2, 3.2.3, 3.2.4, 3.2.5, 3.2.6, 3.2.7, 3.2.8, 3.2.9, 3.2.10, 3.2.11, 3.3.0, 3.3.1" />
 	<!-- no configuration should be needed beyond this point -->
 
 	<property name="oldversions" value="${olderversions}, ${prevversion}" />
diff --git a/phpBB/docs/INSTALL.html b/phpBB/docs/INSTALL.html
index d196403f62..581a26d2ad 100644
--- a/phpBB/docs/INSTALL.html
+++ b/phpBB/docs/INSTALL.html
@@ -151,6 +151,7 @@
 		<li>The following PHP modules are required:
 		<ul>
 			<li>json</li>
+			<li>mbstring</li>
 			<li>XML support</li>
 		</ul>
 		</li>
diff --git a/phpBB/phpbb/db/migration/data/v33x/v332.php b/phpBB/phpbb/db/migration/data/v33x/v332.php
new file mode 100644
index 0000000000..0348b00791
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v33x/v332.php
@@ -0,0 +1,37 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v33x;
+
+class v332 extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		return version_compare($this->config['version'], '3.3.2', '>=');
+	}
+
+	static public function depends_on()
+	{
+		return [
+			'\phpbb\db\migration\data\v33x\v332rc1',
+			'\phpbb\db\migration\data\v32x\v3211',
+		];
+	}
+
+	public function update_data()
+	{
+		return [
+			['config.update', ['version', '3.3.2']],
+		];
+	}
+}