diff --git a/mix.exs b/mix.exs
index b24bbcc6f..5121905dd 100644
--- a/mix.exs
+++ b/mix.exs
@@ -29,7 +29,7 @@ defmodule Ejabberd.Mixfile do
      included_applications: [:lager, :mnesia, :inets, :p1_utils, :cache_tab,
                              :fast_tls, :stringprep, :fast_xml, :xmpp,
                              :stun, :fast_yaml, :esip, :jiffy, :p1_oauth2,
-                             :eimp, :base64url, :jose]
+                             :eimp, :base64url, :jose, :pkix]
                          ++ cond_apps()]
   end