diff --git a/composer.json b/composer.json
index 2333e17..749d31d 100644
--- a/composer.json
+++ b/composer.json
@@ -145,6 +145,9 @@
         {
             "type": "composer",
             "url": "https://packagist.tw"
+        },
+        {
+            "packagist.org": false
         }
     ]
 }