diff --git a/ntfy-config/server.yml b/ntfy-config/server.yml
index b83ec0c..8a3e94c 100644
--- a/ntfy-config/server.yml
+++ b/ntfy-config/server.yml
@@ -4,3 +4,5 @@ auth-file: "/var/cache/ntfy/user.db"
 auth-default-access: "deny-all"
 
 attachment-cache-dir: "/var/cache/ntfy/attachments"
+
+upstream-base-url: "https://ntfy.sh"