diff --git a/Linux_reinstall/Ubuntu/CloudInit/dhcp_interfaces.cfg b/Linux_reinstall/Ubuntu/CloudInit/dhcp_interfaces.cfg
index 8f9934e..bd6bb8b 100644
--- a/Linux_reinstall/Ubuntu/CloudInit/dhcp_interfaces.cfg
+++ b/Linux_reinstall/Ubuntu/CloudInit/dhcp_interfaces.cfg
@@ -14,7 +14,7 @@ system_info:
     - arches: [arm64, armel, armhf]
       failsafe:
         primary: http://targetLinuxMirror/ubuntu-ports
-        security: http://targetLinuxMirror/ubuntu-ports
+        security: http://targetLinuxSecurityMirror/ubuntu-ports
 
 # configure hostname
 hostname: HostName