diff --git a/lib/safira_web/cors.ex b/lib/safira_web/cors.ex
index a3ec363f..da0b1689 100644
--- a/lib/safira_web/cors.ex
+++ b/lib/safira_web/cors.ex
@@ -1,9 +1,14 @@
 defmodule SafiraWeb.CORS do
-  @moduledoc false
+  @moduledoc """
+  Module responsible for CORS configuration.
+  Expects CORS_DOMAIN to be set in the environment.
+  Examples: "localhost:3000", "seium.org"
+  """
+
   @domain System.get_env("CORS_DOMAIN")
 
   use Corsica.Router,
-    origins: ~r{^https?::#{@domain}},
+    origins: ~r{^https?://#{@domain}},
     log: [rejected: :error, invalid: :warn, accepted: :debug],
     allow_headers: :all,
     allow_credentials: true,