diff --git a/data/category-network-security b/data/category-network-security
index dcbee371..6b244608 100644
--- a/data/category-network-security
+++ b/data/category-network-security
@@ -1,3 +1,4 @@
+cnmstl.net @cn
 fofa.so @cn
 t00ls.cc @cn
 t00ls.net @cn