diff --git a/src/Bootstrap/Configurator.php b/src/Bootstrap/Configurator.php
index 080c83a..dd49bb2 100644
--- a/src/Bootstrap/Configurator.php
+++ b/src/Bootstrap/Configurator.php
@@ -50,7 +50,7 @@ class Configurator
 	];
 
 	/** @var string[] of classes which shouldn't be autowired */
-	public $autowireExcludedClasses = ['ArrayAccess', 'Countable', 'IteratorAggregate', 'stdClass', 'Traversable'];
+	public $autowireExcludedClasses = [\ArrayAccess::class, \Countable::class, \IteratorAggregate::class, \stdClass::class, \Traversable::class];
 
 	/** @var array */
 	protected $parameters;