diff --git a/plogical/upgrade.py b/plogical/upgrade.py
index b89b5a65e..2c02dc2e8 100755
--- a/plogical/upgrade.py
+++ b/plogical/upgrade.py
@@ -3568,6 +3568,7 @@ def upgrade(branch):
                 "/etc/csf/csf.ignore",
                 "/etc/csf/csf.rignore",
                 "/etc/csf/csf.blocklists",
+                "/etc/csf/csf.dyndns"
             ]
 
             # Directory for backups