diff --git a/appinfo/info.xml b/appinfo/info.xml
index d3fceee..ccbce02 100644
--- a/appinfo/info.xml
+++ b/appinfo/info.xml
@@ -31,7 +31,7 @@ Additionally, the community document server only supports running on x86-64 Linu
 	<screenshot>https://raw.githubusercontent.com/nextcloud/documentserver_community/master/screenshots/main.png</screenshot>
 	<screenshot>https://raw.githubusercontent.com/nextcloud/documentserver_community/master/screenshots/new.png</screenshot>
 	<dependencies>
-		<nextcloud min-version="21" max-version="33"/>
+		<nextcloud min-version="21" max-version="34"/>
 	</dependencies>
 
 	<background-jobs>
diff --git a/lib/AppInfo/Application.php b/lib/AppInfo/Application.php
index f0a6769..f78c51c 100644
--- a/lib/AppInfo/Application.php
+++ b/lib/AppInfo/Application.php
@@ -62,7 +62,7 @@ public function register(IRegistrationContext $context): void {
 
 		$context->registerService(URLDecoder::class, function (IAppContainer $container) {
 			$server = $container->getServer();
-			$appConfig = new AppConfig('onlyoffice', \OC::$server->getConfig(), \OCP\Log\logger('onlyoffice'), \OC::$server->get(ICacheFactory::class));
+			$appConfig = $this->buildAppConfig();
 			$crypto = new Crypt($appConfig);
 
 			return new URLDecoder(
@@ -75,7 +75,7 @@ public function register(IRegistrationContext $context): void {
 
 		$context->registerService(AutoConfig::class, function (IAppContainer $container) {
 			$server = $container->getServer();
-			$appConfig = new AppConfig('onlyoffice', \OC::$server->getConfig(), \OCP\Log\logger('onlyoffice'), \OC::$server->get(ICacheFactory::class));
+			$appConfig = $this->buildAppConfig();
 			return new AutoConfig(
 				$server->get(IURLGenerator::class),
 				$appConfig
@@ -83,6 +83,35 @@ public function register(IRegistrationContext $context): void {
 		});
 	}
 
+	/**
+	 * Build an onlyoffice AppConfig instance regardless of the connector version.
+	 *
+	 * The onlyoffice connector changed AppConfig's constructor signature over
+	 * time: up to 10.0 it was (string, IConfig, LoggerInterface, ICacheFactory);
+	 * from 10.1 it became (string, IAppConfig, IConfig, IUserConfig,
+	 * LoggerInterface, ICacheFactory). Detect the arity and pass accordingly so
+	 * this app keeps booting across connector and Nextcloud versions.
+	 */
+	private function buildAppConfig(): AppConfig {
+		$config = \OC::$server->get(\OCP\IConfig::class);
+		$logger = \OCP\Log\logger('onlyoffice');
+		$cacheFactory = \OC::$server->get(ICacheFactory::class);
+
+		$paramCount = (new \ReflectionMethod(AppConfig::class, '__construct'))->getNumberOfParameters();
+		if ($paramCount >= 6) {
+			return new AppConfig(
+				'onlyoffice',
+				\OC::$server->get(\OCP\IAppConfig::class),
+				$config,
+				\OC::$server->get(\OCP\Config\IUserConfig::class),
+				$logger,
+				$cacheFactory
+			);
+		}
+
+		return new AppConfig('onlyoffice', $config, $logger, $cacheFactory);
+	}
+
 	public function boot(IBootContext $context): void {
 		$context->injectFn(function (IAppManager $appManager) {
 			if ($appManager->isEnabledForUser('onlyoffice')) {
diff --git a/lib/Document/ConverterBinary.php b/lib/Document/ConverterBinary.php
index 47a44d2..964c5b3 100644
--- a/lib/Document/ConverterBinary.php
+++ b/lib/Document/ConverterBinary.php
@@ -34,7 +34,7 @@ public function __construct(LoggerInterface $logger) {
 		$this->logger = $logger;
 	}
 
-	public function run(string $param, string $password = null): string {
+	public function run(string $param, ?string $password = null): string {
 		if (!is_executable(self::BINARY_DIRECTORY . '/x2t')) {
 			@chmod(self::BINARY_DIRECTORY . '/x2t', 0755);
 		}
diff --git a/lib/Document/DocumentStore.php b/lib/Document/DocumentStore.php
index b5905ef..c0c1911 100644
--- a/lib/Document/DocumentStore.php
+++ b/lib/Document/DocumentStore.php
@@ -73,7 +73,7 @@ private function getDocumentFolder(int $documentId): ISimpleFolder {
 		}
 	}
 
-	public function getDocumentForEditor(int $documentId, File $sourceFile, string $sourceFormat, string $password = null): ISimpleFile {
+	public function getDocumentForEditor(int $documentId, File $sourceFile, string $sourceFormat, ?string $password = null): ISimpleFile {
 		$docFolder = $this->getDocumentFolder($documentId);
 		try {
 			return $docFolder->getFile('Editor.bin');
diff --git a/lib/DocumentConverter.php b/lib/DocumentConverter.php
index babed28..e9b7d8e 100644
--- a/lib/DocumentConverter.php
+++ b/lib/DocumentConverter.php
@@ -42,7 +42,7 @@ public function __construct(ITempManager $tempManager, ConverterBinary $converte
 		$this->converter = $converterBinary;
 	}
 
-	public function getEditorBinary($source, string $sourceExtension, string $targetFolder, string $password = null) {
+	public function getEditorBinary($source, string $sourceExtension, string $targetFolder, ?string $password = null) {
 		$sourceFile = $this->tempManager->getTemporaryFile(".$sourceExtension");
 		file_put_contents($sourceFile, $source);
 
@@ -106,14 +106,14 @@ private function rmdirr($path) {
 	}
 
 
-	public function convertFiles(string $from, string $to, int $targetFormat = DocumentFormat::AVS_OFFICESTUDIO_FILE_CANVAS, string $password = null) {
+	public function convertFiles(string $from, string $to, int $targetFormat = DocumentFormat::AVS_OFFICESTUDIO_FILE_CANVAS, ?string $password = null) {
 		$command = new ConvertCommand($from, $to);
 		$command->setTargetFormat($targetFormat);
 
 		$this->runCommand($command, $password);
 	}
 
-	public function runCommand(ConvertCommand $command, string $password = null) {
+	public function runCommand(ConvertCommand $command, ?string $password = null) {
 		$xmlFile = $this->tempManager->getTemporaryFile('.xml');
 		$xmlWriter = new Writer();
 		$xmlWriter->namespaceMap["http://www.w3.org/2001/XMLSchema-instance"] = "xsi";