diff --git a/README.md b/README.md
index bd765a1..a3c7056 100644
--- a/README.md
+++ b/README.md
@@ -35,8 +35,10 @@ https://k3s.io/:
 curl -sfL https://get.k3s.io | sh -
 ```
 
-# Confiugure upstream DNS-resolver <a name="upstream-dns-resolver"></a>
-Default: 8.8.8.8
+# Configure upstream DNS-resolver <a name="upstream-dns-resolver"></a>
+Docs: https://rancher.com/docs/rancher/v2.x/en/troubleshooting/dns/
+
+Default: 8.8.8.8 => does not resolve local domains!
 1. local /etc/resolv.conf -> ip-of-dnsresolver (127.0.0.1 **does not work!**)
 2. vi /etc/systemd/system/k3s.service:
 ```