diff --git a/Setup-docker-mailserver-using-the-script-setup.sh.md b/Setup-docker-mailserver-using-the-script-setup.sh.md
index 1856382..2617098 100644
--- a/Setup-docker-mailserver-using-the-script-setup.sh.md
+++ b/Setup-docker-mailserver-using-the-script-setup.sh.md
@@ -57,7 +57,7 @@ SUBCOMMANDS:
 
   config:
 
-    ./setup.sh config dkim <keysize> (default: 2048) <domain.tld> (optional - for LDAP setups)
+    ./setup.sh config dkim <keysize> (default: 4096) <domain.tld> (optional - for LDAP setups)
     ./setup.sh config ssl <fqdn>
 
   relay: