diff --git a/composer.json b/composer.json
index f2b06e4..7031937 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
 
 	"require": {
 		"php": ">=8.1",
-		"juniwalk/utils": ">=2.4.1",
+		"juniwalk/utils": ">=2.9.2",
 		"juniwalk/orm": ">=0.7",
 		"nette/application": "^3.0",
 		"nette/forms": "^3.0",
diff --git a/src/AbstractForm.php b/src/AbstractForm.php
index 9b27327..de91c94 100644
--- a/src/AbstractForm.php
+++ b/src/AbstractForm.php
@@ -249,8 +249,8 @@ public function renderModal(bool $keyboard = false, bool|string $backdrop = 'sta
 		$this->setLayout(Layout::Modal);
 		$this->onRender[] = fn($self, $template) => $template->setParameters([
 			'modalOptions' => [
-				'data-backdrop' => Format::scalarize($backdrop),
-				'data-keyboard' => Format::scalarize($keyboard),
+				'data-backdrop' => Format::stringify($backdrop),
+				'data-keyboard' => Format::stringify($keyboard),
 			],
 		]);