diff --git a/README.md b/README.md
index c445b91bf..2688c71a9 100644
--- a/README.md
+++ b/README.md
@@ -131,6 +131,7 @@ docker compose up -d
 ## 😉 Tips & Tricks
 
 - When editing the config file, please don't fill out the settings at the bottom. They're designed *only* for managed hosting, not self hosting. Those settings are much better off being set in Calckey's control panel.
+- Port 3000 (used in the default config) might be already used on your server for something else. To find an open port for Calckey, run `for p in $(seq 3000 4000); do ss -tlnH | tr -s ' ' | cut -d" " -sf4 | grep -q "${p}$" || echo "${p}"; done | head -n 1`
 - I'd ***strongly*** recommend against using CloudFlare, but if you do, make sure to turn code minification off.
 - For push notifications, run `npx web-push generate-vapid-keys`, the put the public and private keys into Control Panel > General > ServiceWorker.
 - For translations, make a [DeepL](https://deepl.com) account and generate an API key, then put it into Control Panel > General > DeepL Translation.