diff --git a/manifest.json b/manifest.json
index f3b92d6..1d746f4 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Minimalist pastebin where the server has zero knowledge of pasted data",
         "fr": "Pastebin minimaliste où le serveur n'a aucune connaissance des données copiées"
     },
-    "version": "1.3.4~ynh2",
+    "version": "1.3.4~ynh3",
     "url": "https://github.com/PrivateBin/PrivateBin",
     "license": "Zlib",
     "maintainer": {
@@ -14,7 +14,7 @@
         "email": "julien.malik@paraiso.me"
     },
     "requirements": {
-        "yunohost": ">= 4.0.0"
+        "yunohost": ">= 4.1.7"
     },
     "multi_instance": true,
     "services": [
@@ -26,29 +26,17 @@
             {
                 "name": "domain",
                 "type": "domain",
-                "ask": {
-                    "en": "Choose a domain for PrivateBin",
-                    "fr": "Choisissez un domaine pour PrivateBin"
-                },
                 "example": "domain.org"
             },
             {
                 "name": "path",
                 "type": "path",
-                "ask": {
-                    "en": "Choose a path for PrivateBin",
-                    "fr": "Choisissez un chemin pour PrivateBin"
-                },
                 "example": "/privatebin",
                 "default": "/privatebin"
             },
             {
                 "name": "is_public",
                 "type": "boolean",
-                "ask": {
-                    "en": "Is it a public site?",
-                    "fr": "Est-ce un site public ?"
-                },
                 "help": {
                     "en": "If private, only YunoHost users can create a paste, but everyone can read it.",
                     "fr": "Si privé, seul les utilisateurs YunoHost peuvent créer un paste, mais tout le monde peut lire."
diff --git a/scripts/change_url b/scripts/change_url
index ac2c77f..d7240ac 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -30,6 +30,23 @@ ynh_script_progression --message="Loading installation settings..."
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 is_public=$(ynh_app_setting_get --app=$app --key=is_public)
 
+#=================================================
+# 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
 #=================================================
@@ -80,7 +97,7 @@ fi
 #=================================================
 # UPDATE SSOWAT
 #=================================================
-ynh_script_progression --message="Reconfiguring SSOwat..."
+ynh_script_progression --message="Reconfiguring permissions..."
 
 if [ $is_public -eq 0 ]
 then