diff --git a/apps/common/db/encoder.py b/apps/common/db/encoder.py
index e09ffd60e..d773491a1 100644
--- a/apps/common/db/encoder.py
+++ b/apps/common/db/encoder.py
@@ -1,12 +1,12 @@
 import json
-import uuid
 import logging
+import uuid
 from datetime import datetime
 
-from django.utils.translation import ugettext_lazy as _
-from django.utils import timezone as dj_timezone
-from django.db import models
 from django.conf import settings
+from django.db import models
+from django.utils import timezone as dj_timezone
+from django.utils.translation import ugettext_lazy as _
 
 lazy_type = type(_('ugettext_lazy'))
 
@@ -28,5 +28,5 @@ class ModelJSONFieldEncoder(json.JSONEncoder):
             try:
                 return super().default(obj)
             except TypeError:
-                logging.error('Type error: ', type(obj))
+                logging.error(f'Type error: {type(obj)}')
                 return str(obj)
diff --git a/apps/tickets/notifications.py b/apps/tickets/notifications.py
index 7e971f4cf..5da077496 100644
--- a/apps/tickets/notifications.py
+++ b/apps/tickets/notifications.py
@@ -3,16 +3,16 @@ from urllib.parse import urljoin
 
 from django.conf import settings
 from django.core.cache import cache
-from django.shortcuts import reverse
 from django.forms import model_to_dict
+from django.shortcuts import reverse
 from django.template.loader import render_to_string
 from django.utils.translation import ugettext_lazy as _
 
-from notifications.notifications import UserMessage
-from common.utils import get_logger, random_string
 from common.db.encoder import ModelJSONFieldEncoder
-from .models import Ticket
+from common.utils import get_logger, random_string
+from notifications.notifications import UserMessage
 from . import const
+from .models import Ticket
 
 logger = get_logger(__file__)