diff --git a/README.md b/README.md
index f2be00d..4dfed2c 100644
--- a/README.md
+++ b/README.md
@@ -27,9 +27,9 @@ use Dotenv\Dotenv;
 $dotenv = Dotenv::createImmutable(dirname(__DIR__));
 $dotenv->load();
 
-$username = $_ENV["USERNAME"]; // username can be obtained from https://www.aade.gr/epiheiriseis/forologikes-ypiresies/mitroo/anazitisi-basikon-stoiheion-mitrooy-epiheiriseon
-$password = $_ENV["PASSWORD"]; // password
-$authorisedCallerAfm = $_ENV["AUTH"]; // optional if same with the caller's afm but if present must be authorised
+$username = $_ENV["AADE_USERNAME"]; // username can be obtained from https://www.aade.gr/epiheiriseis/forologikes-ypiresies/mitroo/anazitisi-basikon-stoiheion-mitrooy-epiheiriseon
+$password = $_ENV["AADE_PASSWORD"]; // password
+$authorisedCallerAfm = $_ENV["AADE_AUTH"]; // optional if same with the caller's afm but if present must be authorised
 $afm = $_ENV["AFM"]; // AFM to search
 
 $crawler = new AadeAfm($username, $password, $authorisedCallerAfm);