diff --git a/.env.example b/.env.example
index 5a5f269..8661fa0 100644
--- a/.env.example
+++ b/.env.example
@@ -10,6 +10,12 @@ DOMAIN=example.com
 # You also need to uncomment the corresponding block in your Caddyfile
 # ADMIN_DOMAIN=
 
+# Ghost ports
+# Ports where Ghost will listen for HTTP traffic.
+# Change these if the default ports are in use, or if Ghost is behind a reverse proxy.
+HTTP_PORT=80
+HTTPS_PORT=443
+
 # Database settings
 # All database settings must not be changed once the database is initialised
 DATABASE_ROOT_PASSWORD=reallysecurerootpassword
diff --git a/compose.yml b/compose.yml
index 32ae177..5fc0fcc 100644
--- a/compose.yml
+++ b/compose.yml
@@ -5,8 +5,8 @@ services:
     image: caddy:2.10.0-alpine@sha256:e2e3a089760c453bc51c4e718342bd7032d6714f15b437db7121bfc2de2654a6
     restart: always
     ports:
-      - "80:80"
-      - "443:443"
+      - "${HTTP_PORT:-80}:80"
+      - "${HTTPS_PORT:-443}:443"
     environment:
       DOMAIN: ${DOMAIN:?DOMAIN environment variable is required}
       ADMIN_DOMAIN: ${ADMIN_DOMAIN:-}