diff --git a/config/domains-blocklist-local-additions.txt b/config/domains-blocklist-local-additions.txt
index ff4f339..c1e7ff8 100644
--- a/config/domains-blocklist-local-additions.txt
+++ b/config/domains-blocklist-local-additions.txt
@@ -145,6 +145,7 @@ click.*
 count.*
 detectportal.firefox.com
 doh.dns.apple.com
+duckdns.org
 ebayrtm.com
 ebis.*
 event.*