diff --git a/gcn_email/cli.py b/gcn_email/cli.py
index 5b489c8..a0f826a 100644
--- a/gcn_email/cli.py
+++ b/gcn_email/cli.py
@@ -11,7 +11,7 @@
 import click
 import prometheus_client
 
-from .core import connect_as_consumer, subscribe_to_topics, recieve_alerts
+from .core import connect_as_consumer, recieve_alerts, subscribe_to_topics
 
 log = logging.getLogger(__name__)
 
diff --git a/gcn_email/core.py b/gcn_email/core.py
index 141152e..2d6aa25 100644
--- a/gcn_email/core.py
+++ b/gcn_email/core.py
@@ -5,19 +5,19 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 #
-from email.message import EmailMessage
+import json
 import logging
 import os
-import json
+from email.message import EmailMessage
 
+import backoff
 import boto3
 from boto3.dynamodb.conditions import Key
 from gcn_kafka import Consumer, config_from_env
-from ratelimit import limits, RateLimitException
-import backoff
+from ratelimit import RateLimitException, limits
 
-from .helpers import periodic_task
 from . import metrics
+from .helpers import periodic_task
 
 SESV2 = boto3.client("sesv2")
 SENDER = f'GCN Notices <{os.environ["EMAIL_SENDER"]}>'
diff --git a/gcn_email/metrics.py b/gcn_email/metrics.py
index 07e94ac..b42b971 100644
--- a/gcn_email/metrics.py
+++ b/gcn_email/metrics.py
@@ -6,6 +6,7 @@
 # SPDX-License-Identifier: Apache-2.0
 #
 """Prometheus metrics."""
+
 import prometheus_client
 
 received = prometheus_client.Counter(