diff --git a/docs/images/docker-speedtest-tracker.md b/docs/images/docker-speedtest-tracker.md
index f48e01ea4..67efdb8e1 100755
--- a/docs/images/docker-speedtest-tracker.md
+++ b/docs/images/docker-speedtest-tracker.md
@@ -55,6 +55,7 @@ services:
       - PGID=1000
       - TZ=Etc/UTC
       - APP_KEY=
+      - APP_URL=
       - DB_CONNECTION=sqlite
       - SPEEDTEST_SCHEDULE=
       - SPEEDTEST_SERVERS=
@@ -81,6 +82,7 @@ docker run -d \
   -e PGID=1000 \
   -e TZ=Etc/UTC \
   -e APP_KEY= \
+  -e APP_URL= \
   -e DB_CONNECTION=sqlite \
   -e SPEEDTEST_SCHEDULE= \
   -e SPEEDTEST_SERVERS= \
@@ -115,6 +117,7 @@ Containers are configured using parameters passed at runtime (such as those abov
 | `PGID=1000` | for GroupID - see below for explanation |
 | `TZ=Etc/UTC` | specify a timezone to use, see this [list](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List). |
 | `APP_KEY=` | App key used for encrypting stored data. You can generate a key at [https://speedtest-tracker.dev](https://speedtest-tracker.dev) |
+| `APP_URL=` | The IP:port or URL your application will be accessed on (ie. `http://192.168.1.1:6875` or `https://bookstack.mydomain.com` |
 | `DB_CONNECTION=sqlite` | Set the database type to use. `sqlite`, `pgsql`, or `mysql` |
 | `SPEEDTEST_SCHEDULE=` | Set the test schedule in cron format. e.g. `0 */6 * * *` |
 | `SPEEDTEST_SERVERS=` | A comma-separated list of server IDs to test against. Run `docker run -it --rm --entrypoint /bin/bash lscr.io/linuxserver/speedtest-tracker:latest list-servers` to get a list of nearby servers. |