diff --git a/app/api/lists/merchant/MerchantLists.php b/app/api/lists/merchant/MerchantLists.php
index ab4997a..33528c3 100644
--- a/app/api/lists/merchant/MerchantLists.php
+++ b/app/api/lists/merchant/MerchantLists.php
@@ -59,7 +59,7 @@ class MerchantLists extends BaseAdminDataLists implements ListsSearchInterface
             ->select()
             ->each(function ($item) use($long,$lat){
                 if($long&&$lat){
-                    $distance = getDistance($lat, $long, $item['lat'], $item['long']);
+                    $distance = getDistance($lat, $long, (float)$item['lat'], (float)$item['long']);
                     if ($distance < 0.9) {
                         $distance = max(bcmul($distance, 1000, 0), 1).'m';
                         if ($distance == '1m') {