diff --git a/config/prod.secret.exs b/config/prod.secret.exs
index c945a45a..753464c5 100644
--- a/config/prod.secret.exs
+++ b/config/prod.secret.exs
@@ -50,6 +50,7 @@ secret_key_base =
 
 config :philomena, PhilomenaWeb.Endpoint,
   http: [:inet6, port: String.to_integer(System.get_env("PORT") || "4000")],
+  url: [host: System.get_env("APP_HOSTNAME"), scheme: "https"],
   secret_key_base: secret_key_base,
   server: true