diff --git a/filters.py b/filters.py
index 7fc4481e6544c04f0b8c33ce31369029e3779884..0aaf70dcf0ad4261e7413bd285921c190d71704b 100644
--- a/filters.py
+++ b/filters.py
@@ -28,7 +28,7 @@ def sort_cards(cards):
     # cards on the same date.
 
     dates = [
-        dp.parse(card["date"]) + datetime.timedelta(rand(0, 10000))
+        dp.parse(card["date"]) + datetime.timedelta(seconds=rand(0, 10000))
         for card in cards
     ]