diff --git a/mix.exs b/mix.exs
index 9b20ad3..c5d1cbf 100644
--- a/mix.exs
+++ b/mix.exs
@@ -15,9 +15,9 @@ defmodule Poxa.Mixfile do
                       :crypto,
                       :gproc,
                       :cowboy,
-                      :signaturex,
                       :jsex,
                       :uuid ],
+      included_applications: [ :signaturex ],
       mod: { Poxa, [] },
       env: [ port: 8080,
              app_key: "app_key",