diff --git a/update-record.py b/update-record.py
index e45e199..88bec3f 100755
--- a/update-record.py
+++ b/update-record.py
@@ -16,11 +16,13 @@
 
 	# split domain
 	h = domain.split('.')
-	if (len(h) != 3):
+	if (len(h) < 3):
 		raise ValueError("invalid subdomain")
 	# end if
 	sub = h[0]
-	domain = h[1] + '.' + h[2]
+	for i in range(1, len(h)-2):
+		sub += '.' + h[i]
+	domain = h[-2] + '.' + h[-1]
 
 	if (args.debug):
 		print(args)