diff --git a/lib/score_calculator.rb b/lib/score_calculator.rb
index 7d77e82d6..a646c467f 100644
--- a/lib/score_calculator.rb
+++ b/lib/score_calculator.rb
@@ -2,7 +2,7 @@ module ScoreCalculator
 
   EPOC           = Time.new(2015, 6, 15)
   COMMENT_WEIGHT = 1.0/20 # 1 positive vote / x comments
-  TIME_UNIT      = 12.hours.to_f
+  TIME_UNIT      = 48.hours.to_f
 
   def self.hot_score(date, votes_total, votes_up, comments_count)
     total   = (votes_total + COMMENT_WEIGHT * comments_count).to_f