diff --git a/auditlog/admin.py b/auditlog/admin.py
index 22b8a81..595ec4c 100644
--- a/auditlog/admin.py
+++ b/auditlog/admin.py
@@ -11,7 +11,7 @@ from auditlog.models import LogEntry
 
 @admin.register(LogEntry)
 class LogEntryAdmin(admin.ModelAdmin, LogEntryAdminMixin):
-    date_hierarchy = 'timestamp'
+    date_hierarchy = "timestamp"
     list_select_related = ["content_type", "actor"]
     list_display = [
         "created",