diff --git a/app/api/serializer.py b/app/api/serializer.py
index 2b150311..54e0d181 100644
--- a/app/api/serializer.py
+++ b/app/api/serializer.py
@@ -323,7 +323,11 @@ def get_alias_infos_with_pagination_v3(
     elif alias_filter == "disabled":
         q = q.filter(Alias.enabled.is_(False))
     elif alias_filter == "hibp":
-        q = q.filter(or_(Alias.hibp_breaches_notified_user, Alias.hibp_breaches_not_notified_user))
+        q = q.filter(
+            or_(
+                Alias.hibp_breaches_notified_user, Alias.hibp_breaches_not_notified_user
+            )
+        )
 
     q = q.order_by(Alias.pinned.desc())
 
diff --git a/app/models.py b/app/models.py
index bae208b9..07d14976 100644
--- a/app/models.py
+++ b/app/models.py
@@ -2083,7 +2083,11 @@ class DomainMailbox(db.Model, ModelMixin):
 class HibpHibpDataClass(db.Model, ModelMixin):
     __tablename__ = "hibp_hibpdataclass"
 
-    __table_args__ = (db.UniqueConstraint("hibp_id", "hibp_dataclass_id", name="uq_hibp_hibpdataclass"),)
+    __table_args__ = (
+        db.UniqueConstraint(
+            "hibp_id", "hibp_dataclass_id", name="uq_hibp_hibpdataclass"
+        ),
+    )
 
     hibp_id = db.Column(db.Integer(), db.ForeignKey("hibp.id"))
     hibp_dataclass_id = db.Column(db.Integer(), db.ForeignKey("hibpdataclass.id"))
@@ -2092,7 +2096,8 @@ class HibpHibpDataClass(db.Model, ModelMixin):
         "Hibp", backref=db.backref("hibp_hibpdataclass", cascade="all, delete-orphan")
     )
     hibpdataclass = db.relationship(
-        "HibpDataClass", backref=db.backref("hibp_hibpdataclass", cascade="all, delete-orphan")
+        "HibpDataClass",
+        backref=db.backref("hibp_hibpdataclass", cascade="all, delete-orphan"),
     )
 
 
diff --git a/cron.py b/cron.py
index c1651fe7..88160588 100644
--- a/cron.py
+++ b/cron.py
@@ -56,7 +56,7 @@ from app.models import (
     DeletedAlias,
     DomainDeletedAlias,
     Hibp,
-    HibpDataClass
+    HibpDataClass,
 )
 from app.utils import sanitize_email
 from server import create_app
@@ -794,9 +794,7 @@ async def _hibp_check(api_key, queue):
 
         if r.status_code == 200:
             # Breaches found
-            breaches = [
-                Hibp.get_by(name=entry["Name"]) for entry in r.json()
-            ]
+            breaches = [Hibp.get_by(name=entry["Name"]) for entry in r.json()]
             if len(alias.hibp_breaches) > 0:
                 LOG.w("%s appears in HIBP breaches %s", alias, alias.hibp_breaches)
         elif r.status_code == 404:
@@ -811,8 +809,16 @@ async def _hibp_check(api_key, queue):
             )
             return
 
-        alias.hibp_breaches_not_notified_user = [breach for breach in breaches if breach not in alias.hibp_breaches_notified_user]
-        alias.hibp_breaches_notified_user = [breach for breach in breaches if breach not in alias.hibp_breaches_not_notified_user]
+        alias.hibp_breaches_not_notified_user = [
+            breach
+            for breach in breaches
+            if breach not in alias.hibp_breaches_notified_user
+        ]
+        alias.hibp_breaches_notified_user = [
+            breach
+            for breach in breaches
+            if breach not in alias.hibp_breaches_not_notified_user
+        ]
 
         alias.hibp_last_check = arrow.utcnow()
         db.session.add(alias)
@@ -847,7 +853,8 @@ async def check_hibp():
         hibp_entry.date = arrow.get(entry["BreachDate"])
         hibp_entry.description = entry["Description"]
         hibp_entry.data_classes = [
-            HibpDataClass.get_by(description=description) for description in entry["DataClasses"]
+            HibpDataClass.get_by(description=description)
+            for description in entry["DataClasses"]
         ]
 
     db.session.commit()
@@ -893,7 +900,11 @@ def notify_hibp():
     Send aggregated email reports for HIBP breaches
     """
     for user in User.query.all():
-        new_breaches = Alias.query.filter(Alias.user_id == user.id).filter(Alias.hibp_breaches_not_notified_user).all()
+        new_breaches = (
+            Alias.query.filter(Alias.user_id == user.id)
+            .filter(Alias.hibp_breaches_not_notified_user)
+            .all()
+        )
 
         if len(new_breaches) == 0:
             return
@@ -906,17 +917,20 @@ def notify_hibp():
             render(
                 "transactional/hibp-new-breaches.txt",
                 user=user,
-                breached_aliases=new_breaches
+                breached_aliases=new_breaches,
             ),
             render(
                 "transactional/hibp-new-breaches.html",
                 user=user,
-                breached_aliases=new_breaches
+                breached_aliases=new_breaches,
             ),
         )
 
         for alias in new_breaches:
-            alias.hibp_breaches_notified_user = alias.hibp_breaches_notified_user + alias.hibp_breaches_not_notified_user
+            alias.hibp_breaches_notified_user = (
+                alias.hibp_breaches_notified_user
+                + alias.hibp_breaches_not_notified_user
+            )
             alias.hibp_breaches_not_notified_user = []
             db.session.add(alias)
 
@@ -942,7 +956,7 @@ if __name__ == "__main__":
             "delete_old_monitoring",
             "check_custom_domain",
             "check_hibp",
-            "notify_hibp"
+            "notify_hibp",
         ],
     )
     args = parser.parse_args()
@@ -982,4 +996,4 @@ if __name__ == "__main__":
             asyncio.run(check_hibp())
         elif args.job == "notify_hibp":
             LOG.d("Notify users with new HIBP breaches")
-            notify_hibp()
\ No newline at end of file
+            notify_hibp()