diff --git a/src/DnsServer/CustomDnsServer.php b/src/DnsServer/CustomDnsServer.php
index c3804b8..f4dcca3 100644
--- a/src/DnsServer/CustomDnsServer.php
+++ b/src/DnsServer/CustomDnsServer.php
@@ -9,6 +9,10 @@
 
 /**
  * User defined dns server
+ * Example GreatBit -> 114DNS
+ *
+ * Primary DNS: 114.114.114.114
+ * Secondary DNS: 114.114.115.115
  */
 final class CustomDnsServer extends AbstractDnsServer
 {