diff --git a/README.md b/README.md
index bf27149..53e0708 100644
--- a/README.md
+++ b/README.md
@@ -78,6 +78,7 @@ services:
       - PGID=1000
       - TZ=Etc/UTC
       - APP_KEY=
+      - APP_URL=
       - DB_CONNECTION=sqlite
       - SPEEDTEST_SCHEDULE=
       - SPEEDTEST_SERVERS=
@@ -104,6 +105,7 @@ 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= \
@@ -131,6 +133,7 @@ Containers are configured using parameters passed at runtime (such as those abov
 | `-e PGID=1000` | for GroupID - see below for explanation |
 | `-e TZ=Etc/UTC` | specify a timezone to use, see this [list](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List). |
 | `-e APP_KEY=` | App key used for encrypting stored data. You can generate a key at [https://speedtest-tracker.dev](https://speedtest-tracker.dev) |
+| `-e 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` |
 | `-e DB_CONNECTION=sqlite` | Set the database type to use. `sqlite`, `pgsql`, or `mysql` |
 | `-e SPEEDTEST_SCHEDULE=` | Set the test schedule in cron format. e.g. `0 */6 * * *` |
 | `-e 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. |
diff --git a/readme-vars.yml b/readme-vars.yml
index 1449afe..3f7537d 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -17,6 +17,7 @@ param_container_name: "{{ project_name }}"
 param_usage_include_env: true
 param_env_vars:
   - { env_var: "APP_KEY", env_value: "", desc: "App key used for encrypting stored data. You can generate a key at [https://speedtest-tracker.dev](https://speedtest-tracker.dev)" }
+  - { env_var: "APP_URL", env_value: "", desc: "The IP:port or URL your application will be accessed on (ie. `http://192.168.1.1:6875` or `https://bookstack.mydomain.com`"}
   - { env_var: "DB_CONNECTION", env_value: "sqlite", desc: "Set the database type to use. `sqlite`, `pgsql`, or `mysql`" }
   - { env_var: "SPEEDTEST_SCHEDULE", env_value: "", desc: "Set the test schedule in cron format. e.g. `0 */6 * * *`" }
   - { env_var: "SPEEDTEST_SERVERS", env_value: "", desc: "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." }