diff --git a/README.md b/README.md
index db20b17..9145e6a 100644
--- a/README.md
+++ b/README.md
@@ -77,6 +77,8 @@ Read the [SANDBOX.md](https://github.com/bluesky-social/pds/blob/main/SANDBOX.md
 
 Self-hosting a Bluesky PDS means running your own Personal Data Server that is capable of federating with the wider Bluesky social network.
 
+To join the network you'll need to join the [AT Protocol PDS Admins Discord](https://discord.gg/UWS6FFdhMe) and register the hostname of your PDS. We recommend doing so before bringing your PDS online. In the future, this registration check will not be required.
+
 ### Preparation for self-hosting PDS
 
 Launch a server on any cloud provider, [Digital Ocean](https://digitalocean.com/) and [Vultr](https://vultr.com/) are two popular choices.