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 a6bc5a3..a82adc5 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
@@ -4,6 +4,8 @@
 
 * http://www.freenom.world/zh/index.html
 
+* https://www.opendns.com/
+
 * https://dns.yandex.com/
 
 * https://www.publicdns.xyz/public/puntcat.html