diff --git a/inc/QrUtil.php b/inc/QrUtil.php
index 293dc99..a822240 100644
--- a/inc/QrUtil.php
+++ b/inc/QrUtil.php
@@ -462,7 +462,8 @@ class QrUtil
                 [
                     'container' => 'amnezia-xray',
                     'xray' => [
-                        'last_config' => json_encode($clientCfg, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT),
+                        // X-Ray config must be wrapped in a "config" field inside the last_config JSON
+                        'last_config' => json_encode(['config' => json_encode($clientCfg, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT)], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES),
                         'port' => (string) $port,
                         'transport_proto' => 'tcp'
                     ]