diff --git a/lib/frenzy_web/controllers/fervor/items_controller.ex b/lib/frenzy_web/controllers/fervor/items_controller.ex
index a6ff02b..9465d07 100644
--- a/lib/frenzy_web/controllers/fervor/items_controller.ex
+++ b/lib/frenzy_web/controllers/fervor/items_controller.ex
@@ -136,7 +136,7 @@ defmodule FrenzyWeb.Fervor.ItemsController do
 
     last_sync =
       with s when is_binary(s) <- Map.get(params, "last_sync"),
-           {:ok, datetime} <- Timex.parse(s) do
+           {:ok, datetime} <- Timex.parse(s, "{ISO:Extended:Z}") do
         datetime
       else
         _ ->