diff --git a/app/helpers/todos_helper.rb b/app/helpers/todos_helper.rb
index 750ace39..e0343135 100644
--- a/app/helpers/todos_helper.rb
+++ b/app/helpers/todos_helper.rb
@@ -1,3 +1,5 @@
+require 'staleness'
+
 module TodosHelper
 
   # === helpers for rendering container
diff --git a/lib/staleness.rb b/lib/staleness.rb
index f377f1bf..a3a02602 100644
--- a/lib/staleness.rb
+++ b/lib/staleness.rb
@@ -1,4 +1,5 @@
 require 'active_support/all'
+require 'user_time'
 
 class Staleness
   SECONDS_PER_DAY = 86400