diff --git a/flashcards/models.py b/flashcards/models.py
index 0b414ad..69eee17 100644
--- a/flashcards/models.py
+++ b/flashcards/models.py
@@ -372,7 +372,7 @@ class Flashcard(Model):
             return delta.total_seconds()
 
         z = 0
-        rate = 1.0 / 3600
+        rate = 1.0 / 120
         for vote in self.userflashcard_set.iterator():
             t = seconds_since_epoch(vote.pulled)
             u = max(z, rate * t)