Bedrock/Composer Error for v1.3

I just pulled the latest release of bedrock into my project and now composer is complaining. I merged 1.3 and verified that the changes are correct, but when I run composer update I receive the following error:

    $ composer update
    Only one package can be installed into the configured webroot.

I am guessing the issue has to do with this commit, but I am not familiar enough with composer to know if there is something wrong.

Here is the snippet of my composer.json file that seems relevant:

  "repositories": [
      "type": "composer",
      "url": ""
  "require": {
    "php": ">=5.4",
    "johnpbloch/wordpress": "4.0.1",
    "composer/installers": "v1.0.12",
    "vlucas/phpdotenv": "1.0.9",
    ...other plugins
  "extra": {
    "installer-paths": {
      "web/app/mu-plugins/{$name}/": ["type:wordpress-muplugin"],
      "web/app/plugins/{$name}/": ["type:wordpress-plugin"],
      "web/app/themes/{$name}/": ["type:wordpress-theme"]
    "wordpress-install-dir": "web/wp"

Any help would be greatly appreciated. For now I am rolling back the changes.


I got that too when updating. The solution is to just delete your vendor/ folder and then re-run composer update or composer install.