diff --git a/mywebdav/billing/usage_tracker.py b/mywebdav/billing/usage_tracker.py
index 22eb2ec..9433a1d 100644
--- a/mywebdav/billing/usage_tracker.py
+++ b/mywebdav/billing/usage_tracker.py
@@ -1,6 +1,8 @@
 import uuid
-from datetime import datetime, date, timezone
+from datetime import datetime, date, timezone, timedelta
+
 from tortoise.transactions import in_transaction
+
 from .models import UsageRecord, UsageAggregate
 from ..models import User
 
@@ -54,7 +56,7 @@ class UsageTracker:
             target_date = date.today()
 
         start_of_day = datetime.combine(target_date, datetime.min.time())
-        end_of_day = datetime.combine(target_date, datetime.max.time())
+        end_of_day = datetime.combine(target_date + timedelta(days=1), datetime.min.time()) - timedelta(microseconds=1)
 
         storage_records = await UsageRecord.filter(
             user=user,