diff --git a/frankenphp/conf.d/20-app.prod.ini b/frankenphp/conf.d/20-app.prod.ini
index 3bcaa71..b716441 100644
--- a/frankenphp/conf.d/20-app.prod.ini
+++ b/frankenphp/conf.d/20-app.prod.ini
@@ -1,2 +1,5 @@
+; https://symfony.com/doc/current/performance.html#use-the-opcache-class-preloading
 opcache.preload_user = root
 opcache.preload = /app/config/preload.php
+; https://symfony.com/doc/current/performance.html#don-t-check-php-files-timestamps
+opcache.validate_timestamps = 0