diff --git a/README.md b/README.md
index f575ae4..74e2240 100644
--- a/README.md
+++ b/README.md
@@ -12,10 +12,10 @@ ip4.clerie.de and ip6.clerie.de just returns the remote addr.
 
 ip4.clerie.de has only an A record. ip6.clerie.de has only an AAAA record.
 
-If you want host this yourself you have to replace all hardcoded domains. You can use the following sed command. Don't forget to change `IP.EXAMPLE.COM`, `IP4.EXAMPLE.COM` and `IP6.EXAMPLE.COM` to your own.
+If you want host this yourself you have to replace all hardcoded domains. You can use the following sed command. Don't forget to change `.EXAMPLE.COM` to your own.
 
 ```
-sed -e '/git.clerie.de/!s/ip.clerie.de/IP.EXAMPLE.COM/g;s/ip4.clerie.de/IP4.EXAMPLE.COM/g;s/ip6.clerie.de/IP6.EXAMPLE.COM/g' ip.clerie.de
+sed -e '/git.clerie.de/!s/.clerie.de/.EXAMPLE.COM/g;' ip.clerie.de
 ```
 
 The first match is to exclude the line with the link to the git repo from replacing.