diff --git a/auditlog/encoder.py b/auditlog/encoder.py
index 43c32b1..7d30418 100644
--- a/auditlog/encoder.py
+++ b/auditlog/encoder.py
@@ -1,7 +1,7 @@
-from django.core.serializers.json import DjangoJSONEncoder
-
 from decimal import Decimal
 
+from django.core.serializers.json import DjangoJSONEncoder
+
 AUDITLOG_BUGGY_REPR_DATATYPES = (Decimal,)
 
 
diff --git a/auditlog/models.py b/auditlog/models.py
index 4f2069c..50e98e2 100644
--- a/auditlog/models.py
+++ b/auditlog/models.py
@@ -351,7 +351,9 @@ class LogEntry(models.Model):
         choices=Action.choices, verbose_name=_("action"), db_index=True
     )
     changes_text = models.TextField(blank=True, verbose_name=_("change message"))
-    changes = models.JSONField(null=True, verbose_name=_("change message"), encoder=AuditLogChangesJSONEncoder)
+    changes = models.JSONField(
+        null=True, verbose_name=_("change message"), encoder=AuditLogChangesJSONEncoder
+    )
     actor = models.ForeignKey(
         to=settings.AUTH_USER_MODEL,
         on_delete=models.SET_NULL,