diff --git a/docs/04-certificate-authority.md b/docs/04-certificate-authority.md
index 5a99686..1f4d7e6 100644
--- a/docs/04-certificate-authority.md
+++ b/docs/04-certificate-authority.md
@@ -300,7 +300,7 @@ cfssl gencert \
   -ca=ca.pem \
   -ca-key=ca-key.pem \
   -config=ca-config.json \
-  -hostname=10.32.0.1,10.240.0.10,10.240.0.11,10.240.0.12,${KUBERNETES_PUBLIC_ADDRESS},127.0.0.1,${KUBERNETES_HOSTNAMES} \
+  -hostname=10.32.0.1,192.168.8.10,192.168.8.11,192.168.8.12,${KUBERNETES_PUBLIC_ADDRESS},127.0.0.1,${KUBERNETES_HOSTNAMES} \
   -profile=kubernetes \
   kubernetes-csr.json | cfssljson -bare kubernetes
 ```