diff --git a/routes/web.php b/routes/web.php
index a26676df..09662617 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -747,7 +747,7 @@ Route::get('/generate/invoices', function(){
 
         $postCodes = \App\Models\SegmentConstant::whereIn('reference', ['CENTER_POSTCODE', 'OUTSTATION_POSTCODE'])->get()->pluck('value');
 
-        if($billingAddress && in_array($deliveryAddress->postcode, $postCodes)){
+        if($billingAddress && in_array($deliveryAddress->postcode, $postCodes->toArray())){
             echo 'generating...';
         }
     }