diff --git a/ns-whitelist.txt b/ns-whitelist.txt
index ba74207e9d..61eb4021d7 100644
--- a/ns-whitelist.txt
+++ b/ns-whitelist.txt
@@ -115,3 +115,4 @@ ns2.oray.net.
 .huaweicloud-dns.cn.
 .360anyu.com.
 .zndns.com.
+.ppstream.com.