diff --git a/appinfo/info.xml b/appinfo/info.xml
index 8c972628..27a9c96e 100755
--- a/appinfo/info.xml
+++ b/appinfo/info.xml
@@ -9,7 +9,7 @@
 Guests accounts can be created from the share menu by entering either the recipients email or name and choosing "create guest account", once the share is created the guest user will receive an email notification about the mail with a link to set their password.
 
 Guests users can only access files shared to them and cannot create any files outside of shares, additionally, the apps accessible to guest accounts are whitelisted.]]></description>
-	<version>3.2.0</version>
+	<version>4.0.0</version>
 	<licence>agpl</licence>
 	<author>Nextcloud</author>
 	<types>
@@ -26,7 +26,7 @@ Guests users can only access files shared to them and cannot create any files ou
 	<screenshot>https://raw.githubusercontent.com/nextcloud/guests/master/screenshots/settings.png</screenshot>
 	<screenshot>https://raw.githubusercontent.com/nextcloud/guests/master/screenshots/dropdown.png</screenshot>
 	<dependencies>
-		<nextcloud min-version="29" max-version="30" />
+		<nextcloud min-version="30" max-version="30" />
 	</dependencies>
 	<commands>
 		<command>OCA\Guests\Command\ListCommand</command>
diff --git a/composer.lock b/composer.lock
index 558d6934..c396a3f2 100644
--- a/composer.lock
+++ b/composer.lock
@@ -858,16 +858,16 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/nextcloud-deps/ocp.git",
-                "reference": "cb36d570c3b7aae1735599cc4b3614b9ce5c9c79"
+                "reference": "5460600953d265eb408baa990102b7ffb5c47134"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/nextcloud-deps/ocp/zipball/cb36d570c3b7aae1735599cc4b3614b9ce5c9c79",
-                "reference": "cb36d570c3b7aae1735599cc4b3614b9ce5c9c79",
+                "url": "https://api.github.com/repos/nextcloud-deps/ocp/zipball/5460600953d265eb408baa990102b7ffb5c47134",
+                "reference": "5460600953d265eb408baa990102b7ffb5c47134",
                 "shasum": ""
             },
             "require": {
-                "php": "~8.0 || ~8.1 || ~8.2",
+                "php": "~8.0 || ~8.1 || ~8.2 || ~8.3",
                 "psr/clock": "^1.0",
                 "psr/container": "^2.0.2",
                 "psr/event-dispatcher": "^1.0",
@@ -877,7 +877,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "28.0.0-dev"
+                    "dev-master": "30.0.0-dev"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -895,7 +895,7 @@
                 "issues": "https://github.com/nextcloud-deps/ocp/issues",
                 "source": "https://github.com/nextcloud-deps/ocp/tree/master"
             },
-            "time": "2023-08-26T00:28:49+00:00"
+            "time": "2024-07-11T00:37:32+00:00"
         },
         {
             "name": "nikic/php-parser",
diff --git a/lib/UserBackend.php b/lib/UserBackend.php
index 2e2a9b6c..0cc22a19 100644
--- a/lib/UserBackend.php
+++ b/lib/UserBackend.php
@@ -23,6 +23,7 @@
 
 namespace OCA\Guests;
 
+use InvalidArgumentException;
 use OC\Cache\CappedMemoryCache;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IDBConnection;
@@ -34,6 +35,7 @@
 use OCP\User\Backend\IGetDisplayNameBackend;
 use OCP\User\Backend\IGetHomeBackend;
 use OCP\User\Backend\IGetRealUIDBackend;
+use OCP\User\Backend\IPasswordHashBackend;
 use OCP\User\Backend\ISetDisplayNameBackend;
 use OCP\User\Backend\ISetPasswordBackend;
 
@@ -47,7 +49,8 @@ class UserBackend extends ABackend implements
 	ICheckPasswordBackend,
 	IGetHomeBackend,
 	ICountUsersBackend,
-	IGetRealUIDBackend {
+	IGetRealUIDBackend,
+	IPasswordHashBackend {
 	/** @var CappedMemoryCache */
 	private $cache;
 	/** @var IEventDispatcher */
@@ -160,6 +163,34 @@ public function setPassword(string $uid, string $password): bool {
 		return false;
 	}
 
+	public function getPasswordHash(string $userId): ?string {
+		if (!$this->userExists($userId)) {
+			return null;
+		}
+		$qb = $this->dbConn->getQueryBuilder();
+		$qb->select('password')
+			->from('guests_users')
+			->where($qb->expr()->eq('uid_lower', $qb->createNamedParameter(mb_strtolower($userId))));
+		/** @var false|string $hash */
+		$hash = $qb->executeQuery()->fetchOne();
+		if ($hash === false) {
+			return null;
+		}
+		return $hash;
+	}
+
+	public function setPasswordHash(string $userId, string $passwordHash): bool {
+		if (!$this->hasher->validate($passwordHash)) {
+			throw new InvalidArgumentException();
+		}
+		$qb = $this->dbConn->getQueryBuilder();
+		$qb->update('guests_users')
+			->set('password', $qb->createNamedParameter($passwordHash))
+			->where($qb->expr()->eq('uid_lower', $qb->createNamedParameter(mb_strtolower($userId))));
+		$result = $qb->executeStatement();
+		return ($result !== 0);
+	}
+
 	/**
 	 * Set display name
 	 *