diff --git a/README.md b/README.md
index 3b1a3d8..624a480 100644
--- a/README.md
+++ b/README.md
@@ -90,6 +90,8 @@ gpg --list-keys
 
 and there will be some long grotty key id such as `C6E74374512CD33FD1C2E47A7E84C28C1F64EAAF`.
 
+It is highly advised to store a copy of that GPG key (the key itself, not just the id), far away from the system being backed up.
+
 ## The Script
 
 And now we wrap it all up in a grotty script
@@ -143,4 +145,4 @@ grep dump /etc/crontab
 
 ---
 
-2020.01.06
\ No newline at end of file
+2020.01.07
\ No newline at end of file