diff --git a/common.php b/common.php
index c63f4494..0969ac06 100644
--- a/common.php
+++ b/common.php
@@ -27,7 +27,7 @@ if (version_compare(phpversion(), '8.1', '<')) die('PHP version 8.1 or higher is
 
 const MYAAC = true;
 const MYAAC_VERSION = '1.0-RC.2';
-const DATABASE_VERSION = 41;
+const DATABASE_VERSION = 42;
 const TABLE_PREFIX = 'myaac_';
 define('START_TIME', microtime(true));
 define('MYAAC_OS', stripos(PHP_OS, 'WIN') === 0 ? 'WINDOWS' : (strtoupper(PHP_OS) === 'DARWIN' ? 'MAC' : 'LINUX'));
diff --git a/install/includes/schema.sql b/install/includes/schema.sql
index 1c8f4ccc..91853e07 100644
--- a/install/includes/schema.sql
+++ b/install/includes/schema.sql
@@ -1,4 +1,4 @@
-SET @myaac_database_version = 41;
+SET @myaac_database_version = 42;
 
 CREATE TABLE `myaac_account_actions`
 (
@@ -91,7 +91,7 @@ CREATE TABLE `myaac_forum`
 	`post_date` int(20) NOT NULL default '0',
 	`last_edit_aid` int(20) NOT NULL default '0',
 	`edit_date` int(20) NOT NULL default '0',
-	`post_ip` varchar(32) NOT NULL default '0.0.0.0',
+	`post_ip` varchar(45) NOT NULL default '0.0.0.0',
 	`sticked` tinyint(1) NOT NULL DEFAULT '0',
 	`closed` tinyint(1) NOT NULL DEFAULT '0',
 	PRIMARY KEY (`id`),
diff --git a/system/migrations/42.php b/system/migrations/42.php
new file mode 100644
index 00000000..92408a59
--- /dev/null
+++ b/system/migrations/42.php
@@ -0,0 +1,15 @@
+<?php
+/**
+ * @var OTS_DB_MySQL $db
+ */
+
+// 2025-09-01
+// resize forum.post_ip to support ipv6
+$up = function () use ($db) {
+	$db->modifyColumn(TABLE_PREFIX . 'forum', 'post_ip', "varchar(45) NOT NULL default '0.0.0.0'");
+};
+
+$down = function () {
+	// there is no downgrade for this
+};
+