diff --git a/app/Http/Controllers/Mobile/BookController.php b/app/Http/Controllers/Mobile/BookController.php
index 8525822..5655e3e 100644
--- a/app/Http/Controllers/Mobile/BookController.php
+++ b/app/Http/Controllers/Mobile/BookController.php
@@ -60,7 +60,7 @@ class BookController extends Controller
                 });
             }
             if (isset($all['category'])) {
-                $query->where('category_id', 'like', '%' . $all['category'] . '%');
+                $query->where('category', 'like', '%' . $all['category'] . '%');
             }
         })->orderBy($all['sort_name'] ?? 'id', $all['sort_type'] ?? 'desc')
             ->paginate($all['page_size'] ?? 20);