diff --git a/setup/webmail.sh b/setup/webmail.sh
index 56efc59b..b0b916f7 100755
--- a/setup/webmail.sh
+++ b/setup/webmail.sh
@@ -185,7 +185,7 @@ cp ${RCM_PLUGIN_DIR}/password/config.inc.php.dist \
 	${RCM_PLUGIN_DIR}/password/config.inc.php
 
 tools/editconf.py ${RCM_PLUGIN_DIR}/password/config.inc.php \
-	"\$config['password_minimum_length']=6;" \
+	"\$config['password_minimum_length']=4;" \
 	"\$config['password_db_dsn']='sqlite:///$STORAGE_ROOT/mail/users.sqlite';" \
 	"\$config['password_query']='UPDATE users SET password=%D WHERE email=%u';" \
 	"\$config['password_dovecotpw']='/usr/bin/doveadm pw';" \