diff --git a/src/Composer/Plugin/PluginInterface.php b/src/Composer/Plugin/PluginInterface.php
index 6eaca4e90..a8c2b6a94 100644
--- a/src/Composer/Plugin/PluginInterface.php
+++ b/src/Composer/Plugin/PluginInterface.php
@@ -27,7 +27,7 @@ interface PluginInterface
*
* @var string
*/
- const PLUGIN_API_VERSION = '1.1.0';
+ const PLUGIN_API_VERSION = '1.0.0';
/**
* Apply plugin modifications to Composer
diff --git a/src/Composer/Plugin/PluginManager.php b/src/Composer/Plugin/PluginManager.php
index a95b34aa7..844b79b76 100644
--- a/src/Composer/Plugin/PluginManager.php
+++ b/src/Composer/Plugin/PluginManager.php
@@ -123,7 +123,9 @@ class PluginManager
$currentPluginApiVersion = $this->getPluginApiVersion();
$currentPluginApiConstraint = new Constraint('==', $this->versionParser->normalize($currentPluginApiVersion));
- if (!$requiresComposer->matches($currentPluginApiConstraint)) {
+ if ($requiresComposer->getPrettyString() === '1.0.0' && $this->getPluginApiVersion() === '1.0.0') {
+ $this->io->writeError('The "' . $package->getName() . '" plugin requires composer-plugin-api 1.0.0, this *WILL* break in the future and it should be fixed ASAP (require ^1.0 for example).');
+ } elseif (!$requiresComposer->matches($currentPluginApiConstraint)) {
$this->io->writeError('The "' . $package->getName() . '" plugin was skipped because it requires a Plugin API version ("' . $requiresComposer->getPrettyString() . '") that does not match your Composer installation ("' . $currentPluginApiVersion . '"). You may need to run composer update with the "--no-plugins" option.');
return;
}