laravel 5.8 composer 近期无法更新，尤其是symfony部分

laravel 5.8 更新composer时，出现无法更新symfony的问题，之前正常的，近期这样了，难道阿里云composer没能完全采集？

 - Downloading symfony/http-kernel (v4.4.36)
    Failed to download symfony/process from dist: curl error 28 while downloading https://api.github.com/repos/symfony/process/zipball/a35d6b8f82e2272504f23a267de49b8717ca0028: Timeout was reached
    Now trying to download from source
  - Syncing symfony/process (v4.4.36) into cache
 2/7 [========>-------------------]  28%    Failed to download symfony/mime from dist: curl error 28 while downloading https://api.github.com/repos/symfony/mime/zipball/1bfd938cf9562822c05c4d00e8f92134d3c8e42d: Timeout was reached
    Now trying to download from source
  - Syncing symfony/mime (v5.4.2) into cache
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