diff --git a/module/oc_telegram_shop/upload/oc_telegram_shop/src/Handlers/CartHandler.php b/module/oc_telegram_shop/upload/oc_telegram_shop/src/Handlers/CartHandler.php
index 8882509d..4b6f111a 100755
--- a/module/oc_telegram_shop/upload/oc_telegram_shop/src/Handlers/CartHandler.php
+++ b/module/oc_telegram_shop/upload/oc_telegram_shop/src/Handlers/CartHandler.php
@@ -3,6 +3,7 @@
 namespace App\Handlers;
 
 use App\Services\CartService;
+use App\Support\Utf8Cleaner;
 use Cart\Cart;
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Openguru\OpenCartFramework\Http\Request;
@@ -23,7 +24,7 @@ class CartHandler
         $items = $this->cartService->getCart();
 
         return new JsonResponse([
-            'data' => $items,
+            'data' => Utf8Cleaner::clean($items),
         ]);
     }
 
@@ -48,7 +49,7 @@ class CartHandler
         }
 
         return new JsonResponse([
-            'data' => $items,
+            'data' => Utf8Cleaner::clean($items),
         ]);
     }
 }
diff --git a/module/oc_telegram_shop/upload/oc_telegram_shop/src/Handlers/OrderHandler.php b/module/oc_telegram_shop/upload/oc_telegram_shop/src/Handlers/OrderHandler.php
index f09214dc..6bf2a0d1 100755
--- a/module/oc_telegram_shop/upload/oc_telegram_shop/src/Handlers/OrderHandler.php
+++ b/module/oc_telegram_shop/upload/oc_telegram_shop/src/Handlers/OrderHandler.php
@@ -4,6 +4,7 @@ namespace App\Handlers;
 
 use App\Exceptions\OrderValidationFailedException;
 use App\Services\OrderCreateService;
+use App\Support\Utf8Cleaner;
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Openguru\OpenCartFramework\Http\Request;
 use Symfony\Component\HttpFoundation\Response;
@@ -26,11 +27,11 @@ class OrderHandler
             ]);
 
             return new JsonResponse([
-                'data' => $order,
+                'data' => Utf8Cleaner::clean($order),
             ], Response::HTTP_CREATED);
         } catch (OrderValidationFailedException $exception) {
             return new JsonResponse([
-                'data' => $exception->getErrorBag()->firstOfAll(),
+                'data' => Utf8Cleaner::clean($exception->getErrorBag()->firstOfAll()),
             ], Response::HTTP_UNPROCESSABLE_ENTITY);
         }
     }
diff --git a/module/oc_telegram_shop/upload/oc_telegram_shop/src/Support/Utf8Cleaner.php b/module/oc_telegram_shop/upload/oc_telegram_shop/src/Support/Utf8Cleaner.php
new file mode 100644
index 00000000..70551354
--- /dev/null
+++ b/module/oc_telegram_shop/upload/oc_telegram_shop/src/Support/Utf8Cleaner.php
@@ -0,0 +1,49 @@
+<?php
+
+namespace App\Support;
+
+class Utf8Cleaner
+{
+    /**
+     * Рекурсивно проходит по массиву/объекту и приводит все строковые значения к валидному UTF-8.
+     */
+    public static function clean($value)
+    {
+        if (is_array($value)) {
+            foreach ($value as $key => $item) {
+                $value[$key] = self::clean($item);
+            }
+
+            return $value;
+        }
+
+        if (is_object($value)) {
+            foreach (get_object_vars($value) as $property => $item) {
+                $value->{$property} = self::clean($item);
+            }
+
+            return $value;
+        }
+
+        if (is_string($value)) {
+            // Попробовать нормализовать строку в UTF-8, подменяя невалидные последовательности.
+            $converted = @mb_convert_encoding($value, 'UTF-8', 'UTF-8');
+
+            if ($converted === false) {
+                // Фолбэк: заменить невалидные байты стандартным алгоритмом json_encode.
+                $encoded = json_encode($value, JSON_INVALID_UTF8_SUBSTITUTE);
+
+                if ($encoded === false) {
+                    return '';
+                }
+
+                // Убираем кавычки, которые добавляет json_encode.
+                return json_decode($encoded, true) ?? '';
+            }
+
+            return $converted;
+        }
+
+        return $value;
+    }
+}
diff --git a/module/oc_telegram_shop/upload/oc_telegram_shop/tests/Unit/Support/Utf8CleanerTest.php b/module/oc_telegram_shop/upload/oc_telegram_shop/tests/Unit/Support/Utf8CleanerTest.php
new file mode 100644
index 00000000..e1a3357f
--- /dev/null
+++ b/module/oc_telegram_shop/upload/oc_telegram_shop/tests/Unit/Support/Utf8CleanerTest.php
@@ -0,0 +1,90 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Unit\Support;
+
+use App\Support\Utf8Cleaner;
+use PHPUnit\Framework\TestCase;
+
+class Utf8CleanerTest extends TestCase
+{
+    /** @test */
+    public function returns_non_string_values_as_is(): void
+    {
+        $this->assertSame(123, Utf8Cleaner::clean(123));
+        $this->assertSame(12.3, Utf8Cleaner::clean(12.3));
+        $this->assertSame(true, Utf8Cleaner::clean(true));
+        $this->assertSame(false, Utf8Cleaner::clean(false));
+        $this->assertNull(Utf8Cleaner::clean(null));
+    }
+
+    /** @test */
+    public function leaves_valid_utf8_strings_unchanged(): void
+    {
+        $value = 'Привет, мир! 😀';
+
+        $this->assertSame($value, Utf8Cleaner::clean($value));
+    }
+
+    /** @test */
+    public function cleans_strings_with_invalid_utf8_bytes(): void
+    {
+        // Строка с заведомо некорректной UTF-8 последовательностью.
+        $invalid = "\xF0\x28\x8C\x28";
+
+        $cleaned = Utf8Cleaner::clean($invalid);
+
+        $this->assertIsString($cleaned);
+        $this->assertNotSame($invalid, $cleaned);
+
+        $json = json_encode($cleaned);
+        $this->assertNotFalse($json, 'Resulting string must be valid UTF-8 for json_encode');
+    }
+
+    /** @test */
+    public function cleans_nested_arrays_recursively(): void
+    {
+        $invalid = "\xF0\x28\x8C\x28";
+
+        $data = [
+            'foo' => 'bar',
+            'nested' => [
+                'value' => $invalid,
+            ],
+        ];
+
+        $cleaned = Utf8Cleaner::clean($data);
+
+        $this->assertIsArray($cleaned);
+        $this->assertSame('bar', $cleaned['foo']);
+        $this->assertIsString($cleaned['nested']['value']);
+        $this->assertNotSame($invalid, $cleaned['nested']['value']);
+
+        $json = json_encode($cleaned);
+        $this->assertNotFalse($json);
+    }
+
+    /** @test */
+    public function cleans_objects_recursively(): void
+    {
+        $invalid = "\xF0\x28\x8C\x28";
+
+        $object = new class {
+            public string $name = 'test';
+            public array $meta = [];
+        };
+
+        $object->meta['invalid'] = $invalid;
+
+        $cleaned = Utf8Cleaner::clean($object);
+
+        $this->assertSame('test', $cleaned->name);
+        $this->assertIsString($cleaned->meta['invalid']);
+        $this->assertNotSame($invalid, $cleaned->meta['invalid']);
+
+        $json = json_encode($cleaned);
+        $this->assertNotFalse($json);
+    }
+}
+