diff --git a/docs/administration/CLI tasks/maintenance_ tasks.md b/docs/administration/CLI tasks/maintenance_ tasks.md
index 938e8635..4e227904 100644
--- a/docs/administration/CLI tasks/maintenance_ tasks.md	
+++ b/docs/administration/CLI tasks/maintenance_ tasks.md	
@@ -16,7 +16,7 @@ mix mobilizon.instance gen [<options>]
 ### Options
 * `-f`, `--force` Whether to erase existing files
 * `-o`, `--output PATH` The path to output the `prod.secret.exs` file. Defaults to `config/prod.secret.exs`.
-* `--output_psql PATH` The path to output the SQL script. Defaults to `setup_db.psql`.
+* `--output-psql PATH` The path to output the SQL script. Defaults to `setup_db.psql`.
 * `--domain DOMAIN` The instance's domain
 * `--instance_name INSTANCE_NAME` The instance's name
 * `--admin_email ADMIN_EMAIL` The administrator's email