diff --git a/routes/web.php b/routes/web.php
index c4db7425..e9dc1a61 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -531,6 +531,7 @@ Route::get('/container/billing/{month}/{year}', function($month, $year){
                 $price += 50;
             }
 
+            $cbm = max($cbm, 0.3);
             $cost = $price * ($cbm + $over_weight_cbm);
 
             $containerCost += $cost;