diff --git a/libraries/helpers/src/subdomain/all.two.level.subdomain.ts b/libraries/helpers/src/subdomain/all.two.level.subdomain.ts
index 1e844141..d0f2c17e 100644
--- a/libraries/helpers/src/subdomain/all.two.level.subdomain.ts
+++ b/libraries/helpers/src/subdomain/all.two.level.subdomain.ts
@@ -1,7 +1,7 @@
 export const allTwoLevelSubdomain = [
     ".net.ac",
     ".ddns.net",
-    "tplinkdns.com",
+    ".tplinkdns.com",
     ".com.de",
     ".synology.me",
     ".gov.ac",