diff --git a/list b/list
index f0afc93..07b3597 100644
--- a/list
+++ b/list
@@ -46,6 +46,7 @@
 ||polyfill.io^
 ||spreadshirt.com^
 ||substack.com^
+||substack-custom-domains.com^
 ||windowsforum.com^
 ||wp.com^
 ||x.com^