diff --git a/debian.txt b/debian.txt
index 4b623ed..a498ebc 100644
--- a/debian.txt
+++ b/debian.txt
@@ -1,10 +1,12 @@
 deb.debian.org
+security.debian.org
 ftp.debian.org
 packages.deepin.com
 http.kali.org
 packages.linuxmint.com
 apt.pop-os.org
 archive.ubuntu.com
+security.ubuntu.com
 ppa.launchpad.net
 repo.radeon.com
 brave-browser-apt-release.s3.brave.com