diff --git a/adminer/drivers/mongo.inc.php b/adminer/drivers/mongo.inc.php
index 7b6453a3..80b45b78 100644
--- a/adminer/drivers/mongo.inc.php
+++ b/adminer/drivers/mongo.inc.php
@@ -66,7 +66,7 @@ if (isset($_GET["mongo"])) {
 								(is_a($val, 'MongoDB\BSON\UTCDatetime') ? $val->toDateTime()->format('Y-m-d H:i:s') :
 									(is_a($val, 'MongoDB\BSON\Binary') ? $val->getData() : //! allow downloading
 										(is_a($val, 'MongoDB\BSON\Regex') ? strval($val) :
-											(is_object($val) ? json_encode($val, 256) : // 256 = JSON_UNESCAPED_UNICODE
+											(is_object($val) || is_array($val) ? json_encode($val, 256) : // 256 = JSON_UNESCAPED_UNICODE
 												$val // MongoMinKey, MongoMaxKey
 											)))));
 					}