diff --git a/src/DependencyInjection/Configuration.php b/src/DependencyInjection/Configuration.php
index 4ac933c..c081f80 100644
--- a/src/DependencyInjection/Configuration.php
+++ b/src/DependencyInjection/Configuration.php
@@ -91,7 +91,7 @@ private function addPanels(ArrayNodeDefinition $rootNode)
 			->fixXmlConfig('panel')
 			->children()
 				->arrayNode(static::PANELS)
-					->prototype('scalar')
+					->prototype('variable')
 				->end()
 			->end();
 	}
diff --git a/src/DependencyInjection/InvalidPanelException.php b/src/DependencyInjection/InvalidPanelException.php
new file mode 100644
index 0000000..1541541
--- /dev/null
+++ b/src/DependencyInjection/InvalidPanelException.php
@@ -0,0 +1,29 @@
+<?php
+/**
+ * This file is part of the Nella Project (https://monolog-tracy.nella.io).
+ *
+ * Copyright (c) 2014 Pavel Kučera (http://github.com/pavelkucera)
+ * Copyright (c) Patrik Votoček (https://patrik.votocek.cz)
+ *
+ * For the full copyright and license information,
+ * please view the file LICENSE.md that was distributed with this source code.
+ */
+
+namespace Nella\MonologTracyBundle\DependencyInjection;
+
+class InvalidPanelException extends \RuntimeException implements \Nella\MonologTracyBundle\DependencyInjection\Exception
+{
+
+	/**
+	 * @param string|mixed[] $panel
+	 * @param \Exception|NULL $previous
+	 */
+	public function __construct($panel, \Exception $previous = NULL)
+	{
+		if (!is_string($panel)) {
+			$panel = var_export($panel, TRUE);
+		}
+		parent::__construct(sprintf('This `%s` is not valid panel.', $panel), 0, $previous);
+	}
+
+}
diff --git a/src/DependencyInjection/MonologTracyExtension.php b/src/DependencyInjection/MonologTracyExtension.php
index 02f4107..e0b6445 100644
--- a/src/DependencyInjection/MonologTracyExtension.php
+++ b/src/DependencyInjection/MonologTracyExtension.php
@@ -16,6 +16,7 @@
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
+use Symfony\Component\DependencyInjection\Reference;
 
 class MonologTracyExtension extends \Symfony\Component\HttpKernel\DependencyInjection\ConfigurableExtension implements \Symfony\Component\DependencyInjection\Extension\PrependExtensionInterface
 {
@@ -237,7 +238,30 @@ private function processInfoItems(Definition $definition, array $infoItems)
 	private function processPanels(Definition $definition, array $panels)
 	{
 		foreach ($panels as $panel) {
-			$definition->addMethodCall('registerPanel', [$panel]);
+			if (is_string($panel) && strncmp($panel, '@', 1) === 0) {
+				$callback = new Reference(substr($panel, 1));
+			} elseif (is_string($panel) && strpos($panel, '::') !== FALSE) {
+				$callback = $panel;
+			} elseif (is_array($panel) && count($panel) === 2) {
+				list($resource, $method) = $panel;
+				if (is_string($resource) && strncmp($resource, '@', 1) === 0) {
+					$callback = [
+						new Reference(substr($resource, 1)),
+						$method,
+					];
+				} elseif (is_string($resource)) {
+					$callback = [
+						$resource,
+						$method,
+					];
+				}
+			}
+
+			if (!isset($callback)) {
+				throw new \Nella\MonologTracyBundle\DependencyInjection\InvalidPanelException($panel);
+			}
+
+			$definition->addMethodCall('registerPanel', [$callback]);
 		}
 	}
 
diff --git a/tests/DependencyInjection/MonologTracyExtensionTest.php b/tests/DependencyInjection/MonologTracyExtensionTest.php
index 6af03a7..64043fc 100644
--- a/tests/DependencyInjection/MonologTracyExtensionTest.php
+++ b/tests/DependencyInjection/MonologTracyExtensionTest.php
@@ -17,6 +17,7 @@
 use Symfony\Bundle\MonologBundle\DependencyInjection\MonologExtension;
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
+use Symfony\Component\DependencyInjection\Reference;
 
 class MonologTracyExtensionTest extends \Matthias\SymfonyDependencyInjectionTest\PhpUnit\AbstractExtensionTestCase
 {
@@ -174,13 +175,74 @@ public function testPanels()
 			MonologTracyExtension::BLUESCREEN_FACTORY_SERVICE_ID,
 			'registerPanel',
 			[
-				'@nella.monolog_tracy.panel.test_panel',
+				new Reference('nella.monolog_tracy.panel.test_panel'),
 			]
 		);
 
 		$this->compile();
 	}
 
+	public function testPanelsArrayWithService()
+	{
+		$this->load([], [
+			'sectionPanelsArrayWithService.yml',
+		]);
+
+		$this->assertContainerBuilderHasServiceDefinitionWithMethodCall(
+			MonologTracyExtension::BLUESCREEN_FACTORY_SERVICE_ID,
+			'registerPanel',
+			[
+				[new Reference('nella.monolog_tracy.panel.test_panel'), '__invoke']
+			]
+		);
+
+		$this->compile();
+	}
+
+	public function testPanelsArray()
+	{
+		$this->load([], [
+			'sectionPanelsArray.yml',
+		]);
+
+		$this->assertContainerBuilderHasServiceDefinitionWithMethodCall(
+			MonologTracyExtension::BLUESCREEN_FACTORY_SERVICE_ID,
+			'registerPanel',
+			[
+				['Nella\MonologTracyBundle\Panel\TestPanel', 'invoke']
+			]
+		);
+
+		$this->compile();
+	}
+
+	public function testPanelsString()
+	{
+		$this->load([], [
+			'sectionPanelsString.yml',
+		]);
+
+		$this->assertContainerBuilderHasServiceDefinitionWithMethodCall(
+			MonologTracyExtension::BLUESCREEN_FACTORY_SERVICE_ID,
+			'registerPanel',
+			[
+				'Nella\MonologTracyBundle\Panel\TestPanel::invoke'
+			]
+		);
+
+		$this->compile();
+	}
+
+	/**
+	 * @expectedException \Nella\MonologTracyBundle\DependencyInjection\InvalidPanelException
+	 */
+	public function testPanelsInvalid()
+	{
+		$this->load([], [
+			'sectionPanelsInvalid.yml',
+		]);
+	}
+
 	public function testCollapsePaths()
 	{
 		try {
diff --git a/tests/DependencyInjection/fixtures/sectionPanelsArray.yml b/tests/DependencyInjection/fixtures/sectionPanelsArray.yml
new file mode 100644
index 0000000..73491ad
--- /dev/null
+++ b/tests/DependencyInjection/fixtures/sectionPanelsArray.yml
@@ -0,0 +1,3 @@
+monolog_tracy:
+    panels:
+        - [Nella\MonologTracyBundle\Panel\TestPanel, invoke]
diff --git a/tests/DependencyInjection/fixtures/sectionPanelsArrayWithService.yml b/tests/DependencyInjection/fixtures/sectionPanelsArrayWithService.yml
new file mode 100644
index 0000000..ea6d6a1
--- /dev/null
+++ b/tests/DependencyInjection/fixtures/sectionPanelsArrayWithService.yml
@@ -0,0 +1,7 @@
+services:
+    nella.monolog_tracy.panel.test_panel:
+        class: Nella\MonologTracyBundle\Panel\TestPanel
+
+monolog_tracy:
+    panels:
+        - ['@nella.monolog_tracy.panel.test_panel', __invoke]
diff --git a/tests/DependencyInjection/fixtures/sectionPanelsInvalid.yml b/tests/DependencyInjection/fixtures/sectionPanelsInvalid.yml
new file mode 100644
index 0000000..2bd28d4
--- /dev/null
+++ b/tests/DependencyInjection/fixtures/sectionPanelsInvalid.yml
@@ -0,0 +1,3 @@
+monolog_tracy:
+    panels:
+        - invalid
diff --git a/tests/DependencyInjection/fixtures/sectionPanelsString.yml b/tests/DependencyInjection/fixtures/sectionPanelsString.yml
new file mode 100644
index 0000000..10d7e9f
--- /dev/null
+++ b/tests/DependencyInjection/fixtures/sectionPanelsString.yml
@@ -0,0 +1,3 @@
+monolog_tracy:
+    panels:
+        - Nella\MonologTracyBundle\Panel\TestPanel::invoke
diff --git a/tests/Panel/TestPanel.php b/tests/Panel/TestPanel.php
index 976ce6a..6fb917a 100644
--- a/tests/Panel/TestPanel.php
+++ b/tests/Panel/TestPanel.php
@@ -47,4 +47,14 @@ public function getPanel($exception)
 		return Dumper::toHtml($exception);
 	}
 
+	/**
+	 * @param \Exception|\Throwable $exception
+	 * @return string[]
+	 */
+	public static function invoke($exception)
+	{
+		$instance = new static();
+		return $instance->__invoke($exception);
+	}
+
 }