diff --git a/README.md b/README.md
index af406d0b..5700881f 100644
--- a/README.md
+++ b/README.md
@@ -118,6 +118,9 @@ services:
       # - WIREGUARD_ADDRESSES=10.64.222.21/32
       # Timezone for accurate log times
       - TZ=
+      # Server list updater. See https://github.com/qdm12/gluetun/wiki/Updating-Servers#periodic-update
+      - UPDATER_PERIOD=
+      - UPDATER_VPN_SERVICE_PROVIDERS=
 ```
 
 🆕 Image also available as `ghcr.io/qdm12/gluetun`