diff --git a/README.md b/README.md
index 29ac304..e499ad6 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,14 @@ copy the [example config](https://schlomp.space/tastytea/libravatarserv/src/bran
 according to your needs. Other webservers and cgi spawners will also work, of
 course.
 
+Add the following DNS records to your nameserver:
+```PLAIN
+_avatars._tcp.example.com.     IN SRV 0 0 80  avatars.example.com
+_avatars-sec._tcp.example.com. IN SRV 0 0 443 avatars.example.com
+```
+`_avatars._tcp.example.com` is for HTTP, `_avatars-sec._tcp.example.com` is for
+HTTPS.
+
 libravatarserv looks in each of `${XDG_DATA_DIRS}` for a directory named
 `libravatarserv`. You can force a different directory by setting the environment
 variable `${AVATAR_DIR}`.