diff --git a/scripts/upgrade b/scripts/upgrade
index e59be3f..d2ade72 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -18,6 +18,13 @@ source /usr/share/yunohost/helpers
 domain=$(ynh_app_setting_get "$app" domain)
 path=$(ynh_app_setting_get "$app" path)
 is_public=$(ynh_app_setting_get "$app" is_public)
+port=$(ynh_app_setting_get "$app" port)
+
+# test port settings
+if [[ "$port" = "" ]]; then
+    port=3000
+    ynh_app_setting_set $app port $port
+fi
 
 # Fix path if needed
 path=$(fix_path $path)
@@ -33,6 +40,7 @@ else
 fi
 
 sed -i "s@YNH_WWW_PATH@${path}@g" $nginx_conf
+sed -i "s@YNH_WWW_PORT@$port@g" $nginx_conf
 sudo cp $nginx_conf /etc/nginx/conf.d/$domain.d/$app.conf
 
 # If app is public, add url to SSOWat conf as skipped_uris
@@ -42,4 +50,4 @@ if [[ $is_public -eq 1 ]]; then
 fi
 
 # Reload nginx service
-sudo systemctl reload nginx
\ No newline at end of file
+sudo systemctl reload nginx