diff --git a/.env.example b/.env.example
index 4e64bb8..8ff2262 100644
--- a/.env.example
+++ b/.env.example
@@ -1,4 +1,7 @@
 # === VARIABLES REQUERIDAS ===
+# Generar con: docker run -it --rm --entrypoint /bin/bash lscr.io/linuxserver/bookstack:latest appkey
+APP_KEY=''
+
 # Generar DB_PASSWORD con: openssl rand -base64 32
 DB_PASSWORD=''
 
diff --git a/docker-compose.yml b/docker-compose.yml
index 160e423..3ea9b90 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -8,6 +8,7 @@ services:
       PGID: 1000
       TZ: Europe/Madrid
       APP_URL: https://${DOMAIN_HOST}
+      APP_KEY: ${APP_KEY}
       DB_HOST: bookstack-db
       DB_PORT: 3306
       DB_DATABASE: ${DB_NAME:-bookstack}