diff --git a/modoboa/core/commands/deploy.py b/modoboa/core/commands/deploy.py
index 7c5a760da..db80ee3c4 100644
--- a/modoboa/core/commands/deploy.py
+++ b/modoboa/core/commands/deploy.py
@@ -247,7 +247,7 @@ class DeployCommand(Command):
         tpl = self._render_template(
             "%s/settings.py.tpl" % self._templates_dir, {
                 "db_connections": connections,
-                "secret_key": _generate_secret_key(parsed_args.secret_key_length),
+                "secret_key": self._generate_secret_key(parsed_args.secret_key_length),
                 "name": parsed_args.name,
                 "allowed_host": allowed_host,
                 "lang": parsed_args.lang,