diff --git a/composer.json b/composer.json
index 8bccc6e..fa2f798 100644
--- a/composer.json
+++ b/composer.json
@@ -8,12 +8,13 @@
             "email": "technical@beapi.fr"
         }
     ],
+    "minimum-stability": "dev",
     "require": {
         "php": ">=5.6",
-        "composer-plugin-api": "^1.1"
+        "composer-plugin-api": "^1.0 || ^2.0"
     },
     "require-dev": {
-        "composer/composer": "^1.4"
+        "composer/composer": "^2.0"
     },
     "autoload": {
         "psr-4": {
diff --git a/src/Command/MakeStableCommand.php b/src/Command/MakeStableCommand.php
index ebd1187..cb06c52 100644
--- a/src/Command/MakeStableCommand.php
+++ b/src/Command/MakeStableCommand.php
@@ -26,23 +26,23 @@ protected function execute( InputInterface $input, OutputInterface $output ) {
 		$output->writeln( "<info>Before proceeding please make sure all your requires have the appropriate minimum stability & some releases !</info>" );
 
 		if ( false === $io->askConfirmation(
-				"Do you really want to set all requires as \"*@stable\" version ?",
+				"Do you really want to set all requires as \"*@stable\" version (y/n) ? ",
 				true ) ) {
-			exit;
+			return 0;
 		}
 
 		$composerPath = $composer->getConfig()->getConfigSource()->getName();
 		$composerFile = new JsonFile( $composerPath );
 		if ( ! $composerFile->exists() ) {
 			$output->writeln( "<error>Composer file not found.</error>" );
-			exit;
+			return 1;
 		}
 
 		// if we cannot write then bail
-		if ( ! is_writeable( $composerPath ) ) {
+		if ( ! is_writable( $composerPath ) ) {
 			$output->writeln( "<error>The composer.json file cannot be rewritten !</error>" );
 			$output->writeln( "<error>Please check your file permissions.</error>" );
-			exit;
+			return 1;
 		}
 
 		try {
@@ -69,10 +69,11 @@ protected function execute( InputInterface $input, OutputInterface $output ) {
 
 			$composerFile->write( $composerJson );
 			$output->writeln( "All requires are now at \"*@stable\" version \o/" );
+			return 0;
 		} catch ( RuntimeException $e ) {
 			$output->writeln( "<error>An error occurred</error>" );
 			$output->writeln( sprintf( "<error>%s</error>", $e->getMessage() ) );
-			exit;
+			return 1;
 		}
 	}
 }
diff --git a/src/MakeStable.php b/src/MakeStable.php
index 85b7e48..a6f1035 100644
--- a/src/MakeStable.php
+++ b/src/MakeStable.php
@@ -26,10 +26,14 @@ public function activate(Composer $composer, IOInterface $io)
         $this->io = $io;
     }
 
-    public function getCapabilities()
+	public function deactivate( Composer $composer, IOInterface $io ) {}
+
+	public function uninstall( Composer $composer, IOInterface $io ) {}
+
+	public function getCapabilities()
     {
         return [
-            'Composer\Plugin\Capability\CommandProvider' => __NAMESPACE__ . '\\MakeStable',
+            CommandProvider::class => __CLASS__,
         ];
     }