diff --git a/src/BaseServiceProvider.php b/src/BaseServiceProvider.php
index 9b260607..a30a47a0 100644
--- a/src/BaseServiceProvider.php
+++ b/src/BaseServiceProvider.php
@@ -101,9 +101,9 @@ public function register()
 
     public function registerAdminMiddleware(Router $router)
     {
-        // in Laravel 5.4
-        if (method_exists($router, 'aliasMiddleware')) {
-            Route::aliasMiddleware('admin', \Backpack\Base\app\Http\Middleware\Admin::class);
+        // in Laravel 5.4 and above
+        if (method_exists($router, 'pushMiddlewareToGroup')) {
+            Route::pushMiddlewareToGroup('admin', \Backpack\Base\app\Http\Middleware\Admin::class);
         }
         // in Laravel 5.3 and below
         else {