diff --git a/composer.json b/composer.json
index cfea8db..c8e93a7 100644
--- a/composer.json
+++ b/composer.json
@@ -28,19 +28,21 @@
             "url": "https://github.com/sponsors/yiisoft"
         }
     ],
+    "minimum-stability": "dev",
+    "prefer-stable": true,
     "require": {
         "ext-pdo": "*",
         "php": "^8.1",
         "yiisoft/db": "^1.2",
         "yiisoft/db-migration": "^1.1",
         "yiisoft/friendly-exception": "^1.1",
-        "yiisoft/rbac": "^2.0"
+        "yiisoft/rbac": "dev-item-type-yii2-compatibility"
     },
     "require-dev": {
         "ext-pdo_sqlite": "*",
         "ext-uopz": "*",
         "maglnet/composer-require-checker": "^4.3",
-        "phpunit/phpunit": "^10.5.5",
+        "phpunit/phpunit": "10.5.5",
         "rector/rector": "^1.0.0",
         "roave/infection-static-analysis-plugin": "^1.25",
         "slope-it/clock-mock": "0.4.0",
diff --git a/migrations/M241008204900UpdateItemType.php b/migrations/M241008204900UpdateItemType.php
new file mode 100644
index 0000000..0f6d560
--- /dev/null
+++ b/migrations/M241008204900UpdateItemType.php
@@ -0,0 +1,70 @@
+<?php
+
+declare(strict_types=1);
+
+use Yiisoft\Db\Migration\MigrationBuilder;
+use Yiisoft\Db\Migration\TransactionalMigrationInterface;
+
+final class M241008204900UpdateItemType implements TransactionalMigrationInterface
+{
+    private const TABLE_PREFIX = 'yii_rbac_';
+    private const ITEMS_TABLE = self::TABLE_PREFIX . 'item';
+
+    public function up(MigrationBuilder $b): void
+    {
+        $b
+            ->getDb()
+            ->createCommand()
+            ->update(table: self::ITEMS_TABLE, columns: ['type' => 1], condition: ['type' => 'role'])
+            ->execute();
+        $b
+            ->getDb()
+            ->createCommand()
+            ->update(table: self::ITEMS_TABLE, columns: ['type' => 2], condition: ['type' => 'permission'])
+            ->execute();
+
+        if ($b->getDb()->getDriverName() !== 'sqlite') {
+            $b->alterColumn(self::ITEMS_TABLE, 'type', $b->smallInteger()->notNull());
+        } else {
+            $b->execute('PRAGMA foreign_keys=off;');
+            $b->dropIndex(self::ITEMS_TABLE, 'idx-' . self::ITEMS_TABLE . '-type');
+            $b->renameTable(self::ITEMS_TABLE, self::ITEMS_TABLE . '_old');
+            $b->createTable(
+                self::ITEMS_TABLE,
+                [
+                    'name' => 'string(126) NOT NULL PRIMARY KEY',
+                    'type' => 'smallint NOT NULL',
+                    'description' => 'string(191)',
+                    'rule_name' => 'string(64)',
+                    'created_at' => 'integer NOT NULL',
+                    'updated_at' => 'integer NOT NULL',
+                ],
+            );
+            $b->createIndex(self::ITEMS_TABLE, 'idx-' . self::ITEMS_TABLE . '-type', 'type');
+            $newTableName = self::ITEMS_TABLE;
+            $oldTableName = self::ITEMS_TABLE . '_old';
+            $b->execute(
+                "INSERT INTO $newTableName (name, type, description, rule_name, created_at, updated_at)
+                SELECT name, type, description, rule_name, created_at, updated_at
+                FROM $oldTableName;"
+            );
+            $b->dropTable($oldTableName);
+            $b->execute('PRAGMA foreign_keys=on;');
+        }
+    }
+
+//    public function down(MigrationBuilder $b): void
+//    {
+//        $b->alterColumn(self::ITEMS_TABLE, 'type', $b->string(10)->notNull());
+//        $b
+//            ->getDb()
+//            ->createCommand()
+//            ->update(table: self::ITEMS_TABLE, columns: ['type' => 'permission'], condition: ['type' => 2])
+//            ->execute();
+//        $b
+//            ->getDb()
+//            ->createCommand()
+//            ->update(table: self::ITEMS_TABLE, columns: ['type' => 'role'], condition: ['type' => 1])
+//            ->execute();
+//    }
+}
diff --git a/migrations/items/M240118192500CreateItemsTables.php b/migrations/items/M240118192500CreateItemsTables.php
index 967b5a0..a7db7e6 100644
--- a/migrations/items/M240118192500CreateItemsTables.php
+++ b/migrations/items/M240118192500CreateItemsTables.php
@@ -30,7 +30,7 @@ private function createItemsTable(MigrationBuilder $b): void
             self::ITEMS_TABLE,
             [
                 'name' => 'string(126) NOT NULL PRIMARY KEY',
-                'type' => 'string(10) NOT NULL',
+                'type' => 'smallint NOT NULL',
                 'description' => 'string(191)',
                 'rule_name' => 'string(64)',
                 'created_at' => 'integer NOT NULL',
diff --git a/src/ItemsStorage.php b/src/ItemsStorage.php
index 76d54c6..95a6819 100644
--- a/src/ItemsStorage.php
+++ b/src/ItemsStorage.php
@@ -421,13 +421,13 @@ public function removeChildren(string $parentName): void
     /**
      * Gets either all existing roles or permissions, depending on a specified type.
      *
-     * @param string $type Either {@see Item::TYPE_ROLE} or {@see Item::TYPE_PERMISSION}.
+     * @param int $type Either {@see Item::TYPE_ROLE} or {@see Item::TYPE_PERMISSION}.
      * @psalm-param Item::TYPE_* $type
      *
      * @return array A list of roles / permissions.
      * @psalm-return ($type is Item::TYPE_PERMISSION ? array<string, Permission> : array<string, Role>)
      */
-    private function getItemsByType(string $type): array
+    private function getItemsByType(int $type): array
     {
         /** @psalm-var RawPermission[] | RawRole[] $rawItems */
         $rawItems = (new Query($this->database))
@@ -441,14 +441,14 @@ private function getItemsByType(string $type): array
     /**
      * Gets a single item by its type and name.
      *
-     * @param string $type Either {@see Item::TYPE_ROLE} or {@see Item::TYPE_PERMISSION}.
+     * @param int $type Either {@see Item::TYPE_ROLE} or {@see Item::TYPE_PERMISSION}.
      * @psalm-param Item::TYPE_* $type
      *
      * @return Permission|Role|null Either role or permission, depending on an initial type specified. `null` is
      * returned when no item was found by given condition.
      * @psalm-return ($type is Item::TYPE_PERMISSION ? Permission : Role)|null
      */
-    private function getItemByTypeAndName(string $type, string $name): Permission|Role|null
+    private function getItemByTypeAndName(int $type, string $name): Permission|Role|null
     {
         /**
          * @psalm-var RawItem|null $row
@@ -473,7 +473,7 @@ private function getItemByTypeAndName(string $type, string $name): Permission|Ro
     private function createItem(array $rawItem): Permission|Role
     {
         $item = $this
-            ->createItemByTypeAndName($rawItem['type'], $rawItem['name'])
+            ->createItemByTypeAndName((int) $rawItem['type'], $rawItem['name'])
             ->withCreatedAt((int) $rawItem['created_at'])
             ->withUpdatedAt((int) $rawItem['updated_at']);
 
@@ -491,13 +491,13 @@ private function createItem(array $rawItem): Permission|Role
     /**
      * A basic factory method for creating a single item with name only.
      *
-     * @param string $type Either {@see Item::TYPE_ROLE} or {@see Item::TYPE_PERMISSION}.
+     * @param int $type Either {@see Item::TYPE_ROLE} or {@see Item::TYPE_PERMISSION}.
      * @psalm-param Item::TYPE_* $type
      *
      * @return Permission|Role Either role or permission, depending on an initial type specified.
      * @psalm-return ($type is Item::TYPE_PERMISSION ? Permission : Role)
      */
-    private function createItemByTypeAndName(string $type, string $name): Permission|Role
+    private function createItemByTypeAndName(int $type, string $name): Permission|Role
     {
         return $type === Item::TYPE_PERMISSION ? new Permission($name) : new Role($name);
     }
@@ -519,10 +519,10 @@ private function removeRelatedItemsChildren(ConnectionInterface $database, strin
     /**
      * Removes all existing items of a specified type.
      *
-     * @param string $type Either {@see Item::TYPE_ROLE} or {@see Item::TYPE_PERMISSION}.
+     * @param int $type Either {@see Item::TYPE_ROLE} or {@see Item::TYPE_PERMISSION}.
      * @psalm-param Item::TYPE_* $type
      */
-    private function clearItemsByType(string $type): void
+    private function clearItemsByType(int $type): void
     {
         $itemsStorage = $this;
         $this->database->transaction(static function (ConnectionInterface $database) use ($itemsStorage, $type): void {
diff --git a/tests/Base/SchemaTrait.php b/tests/Base/SchemaTrait.php
index ef7cf80..6f4cbdd 100644
--- a/tests/Base/SchemaTrait.php
+++ b/tests/Base/SchemaTrait.php
@@ -170,8 +170,8 @@ private function checkItemsTable(): void
 
         $this->assertArrayHasKey('type', $columns);
         $type = $columns['type'];
-        $this->assertSame('string', $type->getType());
-        $this->assertSame(10, $type->getSize());
+        $this->assertSame('smallint', $type->getType());
+        $this->assertNull($type->getSize());
         $this->assertFalse($type->isAllowNull());
 
         $this->assertArrayHasKey('description', $columns);