diff --git a/app/models/notice.rb b/app/models/notice.rb
index 7e9dc8a..14fae93 100644
--- a/app/models/notice.rb
+++ b/app/models/notice.rb
@@ -23,6 +23,7 @@ class Notice
   validates_presence_of :backtrace, :server_environment, :notifier
 
   scope :ordered, order_by(:created_at.asc)
+  index :created_at
 
   def self.from_xml(hoptoad_xml)
     hoptoad_notice = Hoptoad::V2.parse_xml(hoptoad_xml)
--
libgit2 0.21.2