diff --git a/科学上网/DNS是纯净无污染防劫持的.md b/科学上网/DNS是纯净无污染防劫持的.md
index 0f34e5c..0726bbf 100644
--- a/科学上网/DNS是纯净无污染防劫持的.md
+++ b/科学上网/DNS是纯净无污染防劫持的.md
@@ -1,5 +1,7 @@
 * https://1.1.1.1/
 
+* https://www.publicdns.xyz/public/puntcat.html
+
 * https://pdomo.me/
 
 * https://tuna.moe/help/dns/