diff --git a/script/fixes/025_last_commented_at.rb b/script/fixes/025_last_commented_at.rb
index 50c26af02..f73b36c6b 100644
--- a/script/fixes/025_last_commented_at.rb
+++ b/script/fixes/025_last_commented_at.rb
@@ -3,7 +3,11 @@
 require File.expand_path(File.join(File.dirname(__FILE__), '..', '..', 'config', 'environment'))
 
 ActiveRecord::Base.connection.execute("set statement_timeout = 0")
-ActiveRecord::Base.connection.execute("update posts set last_commented_at = (select max(c.created_at) from comments c where c.post_id = posts.id)")
+0.upto(1585206 / 1000) do |i|
+  puts "updating posts #{i * 1000} to #{(i+1) * 1000}"
+  ActiveRecord::Base.connection.execute("update posts set last_commented_at = (select c.created_at from comments c where c.post_id = posts.id order by c.id desc limit 1) where posts.id between #{i * 1000} and #{(i+1) * 1000}")
+end
+
 TagImplication.find_each do |ti|
   ta = TagAlias.where("antecedent_name = ? AND status != ?", ti.antecedent_name, "pending").first
   if ta