diff --git a/.env.example b/.env.example
index f129573..23b3d29 100644
--- a/.env.example
+++ b/.env.example
@@ -17,6 +17,9 @@ PUBLIC_HOST=127.0.0.1
 LOGIN_PORT=29000
 CHAR_PORT=29100
 WORLD_PORT=29200
+# Web tools + admin panel (http://<host>:<this port>/). Change this if port 80
+# is already taken by something else on the host.
+WEBTOOLS_PORT=80
 
 # --- Server / channel naming -----------------------------------------------
 LOGIN_SERVER_NAME=ROSE Login
diff --git a/README.md b/README.md
index 20749bd..185a1c2 100644
--- a/README.md
+++ b/README.md
@@ -31,7 +31,7 @@ That brings up:
 | `loginserver` | `ross-loginserver-1` | `29000` | Account login |
 | `charserver` | `ross-charserver-1` | `29100` | Character select/create/delete |
 | `worldserver` | `ross-worldserver-1` | `29200` | The actual game world |
-| `webtools` | `ross-webtools-1` | `80` | Static GM toolbox (see below) + reverse-proxies `/admin/` |
+| `webtools` | `ross-webtools-1` | `80` (`WEBTOOLS_PORT`) | Static GM toolbox (see below) + reverse-proxies `/admin/` |
 | `webadmin` | `ross-webadmin-1` | — (behind webtools) | Account/character/server admin panel |
 
 Point a KTRose pre-evo client at `PUBLIC_HOST:29000` and log in — `LOGIN_CREATE_ACCOUNT=1` (the default) auto-creates an
diff --git a/docker-compose.yml b/docker-compose.yml
index 0a765db..840785b 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -85,7 +85,7 @@ services:
     image: nginx:alpine
     restart: unless-stopped
     ports:
-      - "80:80"
+      - "${WEBTOOLS_PORT:-80}:80"
     volumes:
       - "./webtools:/usr/share/nginx/html:ro"
       - "./docker/conf/webtools-nginx.conf:/etc/nginx/conf.d/default.conf:ro"