diff --git a/composer.json b/composer.json
index 82cb58e..c2bb947 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
 	],
 	"require": {
 		"php": ">=5.4",
-		"arc/base": "~1.0||~2.0"
+		"arc/base": "~2.1"
 	},
 	"autoload": {
 		"psr-4": {
diff --git a/src/events/EventsTree.php b/src/events/EventsTree.php
index 671d944..53bf557 100644
--- a/src/events/EventsTree.php
+++ b/src/events/EventsTree.php
@@ -98,7 +98,7 @@ private function addListener($eventName, $callback, $capture = false)
     {
         $listenerSection = ( $capture ? 'capture' : 'listen' ) . '.' . $eventName;
         if (!is_callable($callback)) {
-            throw new \arc\ExceptionIlligalRequest('Method is not callable.', \arc\exceptions::ILLEGAL_ARGUMENT);
+            throw new \arc\IllegalRequest('Method is not callable.', \arc\exceptions::ILLEGAL_ARGUMENT);
         }
         if (!isset( $this->tree->nodeValue[ $listenerSection ])) {
             $this->tree->nodeValue[ $listenerSection ] = array();