Check first that XDebug is not loaded in your `php.ini` by running `composer diagnose`. If XDebug is loaded, you should disable it by commenting the line `zend_extension=path/to/xdebug` in your `php.ini`. Don't forget to enable XDebug again after using Composer, if you need it.
If composer still raises the error, the PHP `memory_limit` should be increased.
> **Note:** Composer internally increases the `memory_limit` to `1G`.
> If you have memory issues when using composer, please consider [creating