diff --git a/src/Html/Button.php b/src/Html/Button.php
index 0d17b67..9688572 100755
--- a/src/Html/Button.php
+++ b/src/Html/Button.php
@@ -2,6 +2,7 @@
 
 namespace Yajra\DataTables\Html;
 
+use Closure;
 use Illuminate\Contracts\Support\Arrayable;
 use Illuminate\Support\Fluent;
 use Illuminate\Support\Traits\Macroable;