diff --git a/manifest.json b/manifest.json
index 50aac81..d3b5542 100644
--- a/manifest.json
+++ b/manifest.json
@@ -12,6 +12,9 @@
         "email": "julien.malik@paraiso.me"
     },
     "multi_instance": false,
+    "requirements": {
+        "yunohost": ">= 2.3.16"
+    },
     "services": [
         "nginx",
         "php5-fpm",
diff --git a/scripts/backup b/scripts/backup
index 9a799d2..9cf96c3 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -18,11 +18,11 @@ dbpass=$(ynh_app_setting_get "$app" mysqlpwd)
 
 # Copy the app files
 DESTDIR="/var/www/$app"
-sudo cp -a "$DESTDIR" ./sources
+ynh_backup "$DESTDIR" "sources"
 
 # Copy the conf files
-sudo cp -a "/etc/nginx/conf.d/${domain}.d/${app}.conf" ./nginx.conf
-#sudo cp -a "/etc/php5/fpm/pool.d/${app}.conf" ./php-fpm.conf
+ynh_backup "/etc/nginx/conf.d/${domain}.d/${app}.conf" "nginx.conf"
+#ynh_backup "/etc/php5/fpm/pool.d/${app}.conf" "php-fpm.conf"
 
 # Dump the database
 mysqldump -u "$dbuser" -p"$dbpass" --no-create-db "$dbname" > ./dump.sql