diff --git a/src/app/index.coffee b/src/app/index.coffee
index 20798fc15e..1e8b57938b 100644
--- a/src/app/index.coffee
+++ b/src/app/index.coffee
@@ -308,7 +308,7 @@ ready (model) ->
         model.set "_view.addFriendError", "User with id #{friendId} not found."
 
   exports.emulateNextDay = ->
-    yesterday = moment().subtract('days', 1).toString()
+    yesterday = +moment().subtract('days', 1).toDate()
     user.set 'lastCron', yesterday
     window.location.reload()