diff --git a/lib/comfycamp/sso/id_token.ex b/lib/comfycamp/sso/id_token.ex
index d79da48..0c29572 100644
--- a/lib/comfycamp/sso/id_token.ex
+++ b/lib/comfycamp/sso/id_token.ex
@@ -1,4 +1,5 @@
 defmodule Comfycamp.SSO.IDToken do
+  @derive Jason.Encoder
   defstruct [:iss, :sub, :aud, :exp, :iat]
 
   def build_id_token(user, client_id) do