diff --git a/README.md b/README.md
index 758e4a4..e7e27d4 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ An addictive puzzle game inspired by Tetris.
 ## Documentation
 
  * Official documentation: https://github.com/Hextris/Hextris
- * YunoHost documentation: https://yunohost.org/#/app_hextris
+ * YunoHost documentation: https://yunohost.org/en/app_hextris
 
 
 #### Supported architectures
diff --git a/README_fr.md b/README_fr.md
index 2f2a6c6..2b384ab 100644
--- a/README_fr.md
+++ b/README_fr.md
@@ -1,7 +1,7 @@
 # Hextris pour YunoHost
 
 [![Niveau d'intégration](https://dash.yunohost.org/integration/hextris.svg)](https://dash.yunohost.org/appci/app/hextris) ![](https://ci-apps.yunohost.org/ci/badges/hextris.status.svg) ![](https://ci-apps.yunohost.org/ci/badges/hextris.maintain.svg)  
-[![Installer Hextris avec YunoHost](https://install-app.yunohost.org/install-with-yunohost.png)](https://install-app.yunohost.org/?app=hextris)
+[![Installer Hextris avec YunoHost](https://install-app.yunohost.org/install-with-yunohost.svg)](https://install-app.yunohost.org/?app=hextris)
 
 *[Read this readme in english.](./README.md)* 
 
@@ -25,7 +25,7 @@ Un puzzle addictif inspiré de Tetris.
 ## Documentation
 
  * Documentation officielle : https://github.com/Hextris/Hextris
- * Documentation YunoHost : https://yunohost.org/#/app_hextris
+ * Documentation YunoHost : https://yunohost.org/fr/app_hextris
 
 
 #### Architectures supportées
diff --git a/manifest.json b/manifest.json
index 842e874..3b8a531 100644
--- a/manifest.json
+++ b/manifest.json
@@ -14,7 +14,7 @@
         "email": "aeris@e.email"
     },
     "requirements": {
-        "yunohost": ">= 3.8.1"
+        "yunohost": ">= 4.1.7"
     },
     "multi_instance": true,
     "services": [
@@ -25,29 +25,17 @@
             {
                 "name": "domain",
                 "type": "domain",
-                "ask": {
-                    "en": "Choose a domain for Hextris",
-                    "fr": "Choisissez un domaine pour Hextris"
-                },
                 "example": "domain.org"
             },
             {
                 "name": "path",
                 "type": "path",
-                "ask": {
-                    "en": "Choose a path for Hextris",
-                    "fr": "Choisissez un chemin pour Hextris"
-                },
                 "example": "/hextris",
                 "default": "/hextris"
             },
             {
                 "name": "is_public",
                 "type": "boolean",
-                "ask": {
-                    "en": "Is it a public application?",
-                    "fr": "Est-ce une application publique ?"
-                },
                 "help": {
                     "en": "If enabled, Hextris will be accessible by people who doesn't have an account. This can be changed later via the webadmin.",
                     "fr": "Si cette case est cochée, Hextris sera accessible aux personnes n'ayant pas de compte. Vous pourrez changer ceci plus tard via la webadmin."
diff --git a/scripts/change_url b/scripts/change_url
index 8cc1e30..2480b7f 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -8,7 +8,6 @@
 
 source _common.sh
 source /usr/share/yunohost/helpers
-ynh_abort_if_errors
 
 #=================================================
 # RETRIEVE ARGUMENTS
@@ -30,6 +29,23 @@ ynh_script_progression --message="Loading installation settings..." --weight=1
 # Needed for helper "ynh_add_nginx_config"
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 
+#=================================================
+# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
+#=================================================
+ynh_script_progression --message="Backing up the app before changing its URL (may take a while)..." --weight=1
+
+# Backup the current version of the app
+ynh_backup_before_upgrade
+ynh_clean_setup () {
+	# Remove the new domain config file, the remove script won't do it as it doesn't know yet its location.
+	ynh_secure_remove --file="/etc/nginx/conf.d/$new_domain.d/$app.conf"
+
+	# Restore it if the upgrade fails
+	ynh_restore_upgradebackup
+}
+# Exit if an error occurs during the execution of the script
+ynh_abort_if_errors
+
 #=================================================
 # CHECK WHICH PARTS SHOULD BE CHANGED
 #=================================================
diff --git a/scripts/install b/scripts/install
index c5cfa22..d17e38f 100755
--- a/scripts/install
+++ b/scripts/install
@@ -44,7 +44,6 @@ ynh_script_progression --message="Storing installation settings..." --weight=2
 
 ynh_app_setting_set --app=$app --key=domain --value=$domain
 ynh_app_setting_set --app=$app --key=path --value=$path_url
-ynh_app_setting_set --app=$app --key=is_public --value=$is_public
 
 #=================================================
 # STANDARD MODIFICATIONS
@@ -78,12 +77,12 @@ chown -R root: $final_path
 #=================================================
 # SETUP SSOWAT
 #=================================================
-ynh_script_progression --message="Configuring SSOwat..." --weight=1
+ynh_script_progression --message="Configuring permissions..." --weight=1
 
 # Make app public if necessary
 if [ $is_public -eq 1 ]
 then
-	ynh_permission_update --permission "main" --add visitors
+	ynh_permission_update --permission="main" --add="visitors"
 fi
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 279396a..93506a0 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -46,14 +46,13 @@ if [ -n "$is_public" ]; then
 	if ynh_permission_has_user --permission=main --user=visitors
 	then
 		ynh_app_setting_delete --app=$app --key=skipped_uris
-		ynh_permission_update --permission "main" --add "visitors"
+		ynh_permission_update --permission="main" --add="visitors"
 	else
 		ynh_app_setting_delete --app=$app --key=skipped_uris
 	fi
 	ynh_app_setting_delete --app=$app --key=is_public
 fi
 
-
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
 #=================================================