diff --git a/mix.exs b/mix.exs
index 313311b..5aef279 100644
--- a/mix.exs
+++ b/mix.exs
@@ -8,6 +8,7 @@ defmodule Floof.MixProject do
       elixir: "~> 1.13",
       start_permanent: Mix.env() == :prod,
       compilers: [:asn1] ++ Mix.compilers(),
+      asn1_options: [:per],
       deps: deps()
     ]
   end