diff --git a/src/MandrillWebhookController.php b/src/MandrillWebhookController.php
index 3e96383..9039916 100644
--- a/src/MandrillWebhookController.php
+++ b/src/MandrillWebhookController.php
@@ -22,7 +22,8 @@ public function handleWebHook(Request $request)
 
         foreach ($events as $event) {
 
-            $method = 'handle' . studly_case(str_replace('.', '_', $event['event']));
+            $eventName = isset($event['event']) ? $event['event'] : 'undefined';
+            $method = 'handle' . studly_case(str_replace('.', '_', $eventName));
 
             if ( method_exists($this, $method) ) {
                 $this->{$method}($event);