diff --git a/how-to-configure-hardened-raspberry-pi/README.md b/how-to-configure-hardened-raspberry-pi/README.md
index 4e82224..134f74b 100644
--- a/how-to-configure-hardened-raspberry-pi/README.md
+++ b/how-to-configure-hardened-raspberry-pi/README.md
@@ -321,6 +321,8 @@ apt install -y iptables-persistent vim
 
 #### Upgrade packages
 
+> Heads-up: if asked which version of `/etc/ssh/sshd_config` to keep, select “keep the local version currently installed”.
+
 ```shell
 apt upgrade -y
 ```