diff --git a/README.md b/README.md
index 3a7373b2..873f83ec 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,8 @@ The idea is that you can just generate a container using the image and provide t
 First, make sure the host where you are going to run shlink fulfills these requirements:
 
 * PHP 7.4 with JSON, curl, PDO, intl and gd extensions enabled (PHP 8.0 support is coming).
+    * apcu extension is recommended if you don't plan to use swoole.
+    * xml extension is required if you want to generate QR codes in svg format.
 * MySQL, MariaDB, PostgreSQL, Microsoft SQL Server or SQLite.
 * The web server of your choice with PHP integration (Apache or Nginx recommended).