diff --git a/docs/DDNS.md b/docs/DDNS.md
index 26227b9..787dbbc 100644
--- a/docs/DDNS.md
+++ b/docs/DDNS.md
@@ -14,7 +14,7 @@ You can access your Polaris installation from anywhere via your computer's publi
 
 A solution to these problems is to set up Dynamic DNS, so that your installation can always be reached at a fixed URL.
 
-1. Reserve a URL with a dynamic DNS provider such as https://www.duckdns.org/, https://freemyip.com/ or https://ydns.io/.
+1. Reserve a URL with a dynamic DNS provider such as https://www.duckdns.org/ or https://freemyip.com/.
 2. The dynamic DNS provider gives you a unique Update URL that can be used to tell them where to send traffic. For example, `freemyip.com` gives you this URL immediately after claiming a subdomain. Other providers may show it in your profile page, etc.
 3. Access your Polaris instance (http://localhost:5050 by default).
 4. Go to the `Setting page` and into the `Dynamic DNS` section.