diff --git a/src/Statistics/DnsResolver.php b/src/Statistics/DnsResolver.php
index ec81212..29816a4 100644
--- a/src/Statistics/DnsResolver.php
+++ b/src/Statistics/DnsResolver.php
@@ -7,6 +7,9 @@ use React\Promise\FulfilledPromise;
 
 class DnsResolver extends Resolver
 {
+    /*
+     * This empty constructor is needed so we don't have to setup the parent's dependencies.
+     */
     public function __construct()
     {
         //