diff --git a/src/TodoList.tsx b/src/TodoList.tsx
index b49bd82..41cc039 100644
--- a/src/TodoList.tsx
+++ b/src/TodoList.tsx
@@ -97,7 +97,7 @@ function AddTodoItem({ items, setItems }: {
       />
       <button
         onClick={handleAddItem}
-        className="px-4 py-2 text-sm font-medium text-white bg-blue-500 rounded-md shadow-md hover:bg-blue-600"
+        className="px-4 py-2 text-sm whitespace-nowrap font-medium text-white bg-blue-500 rounded-md shadow-md hover:bg-blue-600"
       >
         添加
       </button>