diff --git a/manifest.json b/manifest.json
index 7ea38b7..580b437 100644
--- a/manifest.json
+++ b/manifest.json
@@ -2,7 +2,10 @@
   "name": "Shell In A Box",
   "id": "shellinabox",
   "packaging_format": 1,
-  "description": {
+  "requirements": {
+    "yunohost": ">> 2.3.15"
+  },
+   "description": {
     "en": "Web based AJAX terminal emulator",
     "fr": "Émulateur de terminal web"
   },
diff --git a/scripts/backup b/scripts/backup
index a6c1912..383377c 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -3,8 +3,11 @@
 # causes the shell to exit if any subcommand or pipeline returns a non-zero status
 set -e
 
-# Retrieve arguments
-app="shellinabox"
+# Source YNH helpers
+. /usr/share/yunohost/helpers
+
+app=${!#}
+
 domain=$(sudo yunohost app setting $app domain)
 
 # Backup directory location for the app from where the script is executed and 
@@ -13,4 +16,4 @@ backup_dir=$YNH_APP_BACKUP_DIR
 
 # Copy the conf files
 sudo mkdir -p ./conf
-sudo cp -a "/etc/nginx/conf.d/${domain}.d/${app}.conf" ./conf/nginx.conf
\ No newline at end of file
+ynh_backup "/etc/nginx/conf.d/${domain}.d/${app}.conf" ./conf/nginx.conf
\ No newline at end of file
diff --git a/scripts/restore b/scripts/restore
index 9e4029f..9844c5f 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -4,7 +4,8 @@
 set -e
 
 # Retrieve arguments
-app="shellinabox"
+app=${!#}
+
 domain=$(sudo yunohost app setting $app domain)
 path=$(sudo yunohost app setting $app path)