diff --git a/composer.json b/composer.json
index eecce2b..a9426c6 100644
--- a/composer.json
+++ b/composer.json
@@ -19,6 +19,6 @@
         "class": "Joomlatools\\Composer\\Plugin"
     },
     "require": {
-        "composer-plugin-api": "^1.0"
+        "composer-plugin-api": "^2.0"
     }
 }
diff --git a/src/Joomlatools/Composer/ExtensionInstaller.php b/src/Joomlatools/Composer/ExtensionInstaller.php
index 2003e1c..004fc7f 100644
--- a/src/Joomlatools/Composer/ExtensionInstaller.php
+++ b/src/Joomlatools/Composer/ExtensionInstaller.php
@@ -33,6 +33,10 @@ public function __construct(IOInterface $io)
 
     public function execute()
     {
+        if (!Util::isJoomla() && !Util::isJoomlatoolsPlatform()) {
+            return true;
+        }
+
         $application = Bootstrapper::getInstance()->getApplication();
 
         if ($application === false)
diff --git a/src/Joomlatools/Composer/Plugin.php b/src/Joomlatools/Composer/Plugin.php
index f20b405..4bf6fae 100644
--- a/src/Joomlatools/Composer/Plugin.php
+++ b/src/Joomlatools/Composer/Plugin.php
@@ -40,13 +40,13 @@ class Plugin implements PluginInterface, EventSubscriberInterface
      */
     public function activate(Composer $composer, IOInterface $io)
     {
-        if (!Util::isJoomla() && !Util::isJoomlatoolsPlatform()) {
-            throw new \RuntimeException('Working directory is not a valid Joomla installation');
-        }
-
         $this->_composer = $composer;
         $this->_io = $io;
 
+        if (!Util::isJoomla() && !Util::isJoomlatoolsPlatform()) {
+            return true;
+        }
+
         $credentials = $this->_composer->getConfig()->get('joomla');
 
         if(is_null($credentials) || !is_array($credentials)) {
@@ -64,7 +64,7 @@ public function activate(Composer $composer, IOInterface $io)
     public static function getSubscribedEvents()
     {
         return array(
-            ScriptEvents::POST_AUTOLOAD_DUMP => 'postAutoloadDump'
+            'post-autoload-dump' => 'postAutoloadDump'
         );
     }
 
@@ -73,4 +73,14 @@ public function postAutoloadDump(Event $event)
         $extensionInstaller = new ExtensionInstaller($this->_io);
         $extensionInstaller->execute();
     }
+
+    public function uninstall(Composer $composer, IOInterface $io)
+    {
+        // TODO: Implement uninstall() method.
+    }
+
+    public function deactivate(Composer $composer, IOInterface $io)
+    {
+        // TODO: Implement deactivate() method.
+    }
 }
\ No newline at end of file