diff --git a/argos/schemas/config.py b/argos/schemas/config.py
index 5fe305b..c0014ab 100644
--- a/argos/schemas/config.py
+++ b/argos/schemas/config.py
@@ -4,7 +4,15 @@ For database models, see argos.server.models.
 """
 from typing import Dict, List, Literal, Optional, Tuple
 
-from pydantic import BaseModel, ConfigDict, HttpUrl, StrictBool, EmailStr, PositiveInt, field_validator
+from pydantic import (
+    BaseModel,
+    ConfigDict,
+    HttpUrl,
+    StrictBool,
+    EmailStr,
+    PositiveInt,
+    field_validator,
+)
 from pydantic.functional_validators import BeforeValidator
 from typing_extensions import Annotated
 
diff --git a/argos/server/alerting.py b/argos/server/alerting.py
index e239885..3c5c9c2 100644
--- a/argos/server/alerting.py
+++ b/argos/server/alerting.py
@@ -56,5 +56,3 @@ Subject: {subject}
         logger.debug('Sending mail to %s', address)
         logger.debug(msg)
         smtp.sendmail(config.mailfrom, address, mail)
-
-    return None