diff --git a/app/item/views.py b/app/item/views.py
index 9995937..f4b5b20 100644
--- a/app/item/views.py
+++ b/app/item/views.py
@@ -89,7 +89,7 @@ def archive(request, year=None, month=None, day=None, week=None):
     archive = models.Item.all_public()
     if year and month and day:
         date = datetime.strptime('%s-%s-%s' % (year, month, day), '%Y-%m-%d')
-        week = int(date.strftime('%W'))
+        week = int(date.strftime('%U'))
         year = int(year)
         archive_week = archive.filter(year=year, week=week).order_by('published')
         years = {}