diff --git a/src/Renderer/PhpRenderer.php b/src/Renderer/PhpRenderer.php
index 7713049..abccaba 100644
--- a/src/Renderer/PhpRenderer.php
+++ b/src/Renderer/PhpRenderer.php
@@ -16,7 +16,7 @@ class PhpRenderer implements Renderer
 	/**
 	 * @inheritDoc
 	 */
-	public function render(object $arguments): string
+	public function render(object $arguments = new \stdClass()): string
 	{
 		// Extract render arguments.
 		extract((array) $arguments);
diff --git a/src/Renderer/Renderer.php b/src/Renderer/Renderer.php
index 5c38daf..cafa5b3 100644
--- a/src/Renderer/Renderer.php
+++ b/src/Renderer/Renderer.php
@@ -12,5 +12,5 @@ interface Renderer
 	 * @param object $arguments View arguments.
 	 * @return string Produced view.
 	 */
-	function render(object $arguments): string;
+	function render(object $arguments = new \stdClass()): string;
 }
diff --git a/src/Router/Controller.php b/src/Router/Controller.php
index 9b16945..a99c4b6 100644
--- a/src/Router/Controller.php
+++ b/src/Router/Controller.php
@@ -98,7 +98,7 @@ abstract class Controller
 	 * @param string|null $contentType The content type of the response.
 	 * @return ResponseInterface Built response.
 	 */
-	public function render(Renderer $renderer, object $arguments, StatusCode $statusCode = StatusCode::OK, ?string $contentType = null): ResponseInterface
+	public function render(Renderer $renderer, object $arguments = new \stdClass(), StatusCode $statusCode = StatusCode::OK, ?string $contentType = null): ResponseInterface
 	{
 		return $this->newResponse($statusCode, $contentType ?? null, $renderer->render($arguments));
 	}