diff --git a/.env.sample b/.env.sample
index cb8e616..ff932f2 100644
--- a/.env.sample
+++ b/.env.sample
@@ -5,6 +5,8 @@ DOMAIN=nextcloud.example.com
 #EXTRA_DOMAINS=', `www.nextcloud.example.com`'
 LETS_ENCRYPT_ENV=production
 
+ADMIN_USER=admin
+
 SECRET_DB_ROOT_PASSWORD_VERSION=v1
 SECRET_DB_PASSWORD_VERSION=v1
 SECRET_ADMIN_PASSWORD_VERSION=v1
diff --git a/compose.yml b/compose.yml
index 364aba3..a9b1129 100644
--- a/compose.yml
+++ b/compose.yml
@@ -16,7 +16,7 @@ services:
       - MYSQL_DATABASE=nextcloud
       - MYSQL_USER=nextcloud
       - MYSQL_PASSWORD_FILE=/run/secrets/db_password
-      - NEXTCLOUD_ADMIN_USER=admin
+      - NEXTCLOUD_ADMIN_USER=${ADMIN_USER}
       - NEXTCLOUD_ADMIN_PASSWORD_FILE=/run/secrets/admin_password
       - NEXTCLOUD_TRUSTED_DOMAINS=${DOMAIN}
       - APACHE_DISABLE_REWRITE_IP=1