diff --git a/README.md b/README.md
index 18ebd04..a26bcb2 100644
--- a/README.md
+++ b/README.md
@@ -26,11 +26,12 @@ Depending on your dyndns provider you can either use `username`/`password` or `t
 
 ddnssclient can also be configured using some properties or environment variables
 
-| Property                    | Environment variable        | Value                             | Default |
-|-----------------------------|-----------------------------|-----------------------------------|---------|
-| ddnsclient.interval         | DDNSCLIENT_INTERVAL         | e.g. "3600s", "60m", "1h"         | "5m"    |
-| ddnsclient.ip-provider      | DDNSCLIENT_IP_PROVIDER      | an ip lookup provider (see below) | null    |
-| ddnsclient.backoff-duration | DDNSCLIENT_BACKOFF_DURATION | e.g. "60s", "1m"                  | "300s"  |
+| Property                    | Environment variable        | Value                             | Default       |
+|-----------------------------|-----------------------------|-----------------------------------|---------------|
+| ddnsclient.interval         | DDNSCLIENT_INTERVAL         | e.g. "3600s", "60m", "1h"         | "5m"          |
+| ddnsclient.ip-provider      | DDNSCLIENT_IP_PROVIDER      | an ip lookup provider (see below) | null (random) |
+| ddnsclient.dns.resolver     | DDNSCLIENT_DNS_RESOLVER     | e.g. "9.9.9.9", "1.1.1.1"         | "9.9.9.9"     |
+| ddnsclient.backoff-duration | DDNSCLIENT_BACKOFF_DURATION | e.g. "60s", "1m"                  | "300s"        |
 
 ## IP lookup