diff --git a/lib/domains/blacklist.txt b/lib/domains/blacklist.txt
index df0b7553e5..40be3b9b4d 100644
--- a/lib/domains/blacklist.txt
+++ b/lib/domains/blacklist.txt
@@ -109,4 +109,5 @@ student.ksu.edu.sa
 vip.henu.edu.cn
 student.napavalley.edu
 mycom.marin.edu 
-alu.comillas.edu
\ No newline at end of file
+alu.comillas.edu
+zknu.edu.cn
\ No newline at end of file