diff --git a/doc/PRE_UPGRADE.d/0.107.48~ynh3.md b/doc/PRE_UPGRADE.d/0.107.48~ynh3.md
index e50d061..b755e06 100644
--- a/doc/PRE_UPGRADE.d/0.107.48~ynh3.md
+++ b/doc/PRE_UPGRADE.d/0.107.48~ynh3.md
@@ -1,4 +1,11 @@
-⚠️ **Important thing to do before upgrading:** if you enabled the "Enable DNS-over-HTTPS" option in your config panel, please disable it before upgrading, else the upgrade will fail! ⚠️
+⚠️ **Important thing to do before upgrading:**  
+⚠️ If you enabled the "Enable DNS-over-HTTPS" option in your config panel, please disable it and execute the following command before upgrading, else the upgrade will fail!
+
+```bash
+yunohost firewall disallow Both 853 --no-reload && yunohost firewall disallow Both 784
+```
+
+---
 
 From this 0.107.48~ynh3 version, some things have changed: