diff --git a/src/Controller/ProductController.php b/src/Controller/ProductController.php
index 54819da..408b0c7 100644
--- a/src/Controller/ProductController.php
+++ b/src/Controller/ProductController.php
@@ -28,6 +28,10 @@ final class ProductController extends BaseController
         }
         $priceList = $product->price()->pluck('price', 'created_at')->mapWithKeys(fn($price, $createdAt) => [explode(' ', $createdAt)[0] => $price])->toArray();
         $stockList = $product->stock()->pluck('stock', 'created_at')->mapWithKeys(fn($stock, $createdAt) => [explode(' ', $createdAt)[0] => $stock])->toArray();
+
+        ksort($stockList);
+        ksort($priceList);
+
         return $this->render('product.html.twig', [
             'product' => $product,
             'price_list' => $this->prepareChartData($priceList),