diff --git a/debian.txt b/debian.txt
index 148851e..924b727 100644
--- a/debian.txt
+++ b/debian.txt
@@ -1,7 +1,6 @@
 deb.debian.org
 ftp.debian.org
 packages.deepin.com
-security.debian.org
 http.kali.org
 packages.linuxmint.com
 apt.pop-os.org