diff --git a/.travis.yml b/.travis.yml
index b09dd55..bce2800 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,8 @@ language: php
 php:
   - '7.2'
 
+before_script:
+   - composer self-update --rollback
 script:
    - composer install
    - vendor/bin/phpunit
\ No newline at end of file
diff --git a/README.md b/README.md
index 2b16b0c..30bed57 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # CODE QUALITY PLUGIN
 
-[![Build Status](https://travis-ci.com/thewalkingcoder/code-quality-plugin.svg?branch=master)](https://travis-ci.com/thewalkingcoder/code-quality-plugin)
+[![Build Status](https://travis-ci.com/thewalkingcoder/code-quality-plugin.svg?branch=1.x)](https://travis-ci.com/thewalkingcoder/code-quality-plugin)
 
 Plugin composer permettant la mise en place d'outils pour une  analyse qualité et respect des standards sur un projet symfony.
 
@@ -8,20 +8,12 @@ Plugin composer permettant la mise en place d'outils pour une  analyse qualité
 
 - git >=2.17
 - symfony (website-skeleton) >=4.4 ou symfony >=4.4 (skeleton) avec le pack symfony/test-pack
-- composer 2.x
+- composer 1.x
 
 # Installation
 
 ```
 
-composer require twc/code-quality-plugin --dev
-
-```
-
-If you use composer v1.x try
-
-```
-
 composer require twc/code-quality-plugin:^1.0 --dev
 
 ```
diff --git a/src/CodeQualityPlugin.php b/src/CodeQualityPlugin.php
index 1ef5404..681bbb7 100644
--- a/src/CodeQualityPlugin.php
+++ b/src/CodeQualityPlugin.php
@@ -56,4 +56,14 @@ public function postInstall()
         $this->io->write($process->getOutput());
         $this->io->write('<info>twc/code-quality-plugin:</info> ...installation terminée');
     }
+
+    public function deactivate(Composer $composer, IOInterface $io)
+    {
+        // TODO: Implement deactivate() method.
+    }
+
+    public function uninstall(Composer $composer, IOInterface $io)
+    {
+        // TODO: Implement uninstall() method.
+    }
 }
diff --git a/src/Command/AllInstall.php b/src/Command/AllInstall.php
index 37836de..1c74f83 100644
--- a/src/Command/AllInstall.php
+++ b/src/Command/AllInstall.php
@@ -38,6 +38,8 @@ protected function execute(InputInterface $input, OutputInterface $output)
         $process->run();
 
         $this->clearModels();
+
+        return 0;
     }
 
     private function clearModels()
diff --git a/src/Command/CommitForce.php b/src/Command/CommitForce.php
index f26decf..96d1d09 100644
--- a/src/Command/CommitForce.php
+++ b/src/Command/CommitForce.php
@@ -37,6 +37,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
 
         $this->restore(['pre-commit.tempo', 'commit-msg.tempo']);
         $output->write($process->getOutput());
+        return 0;
     }
 
     private function getHooksDir()
diff --git a/src/Command/HooksInstall.php b/src/Command/HooksInstall.php
index ada1dc3..9659790 100644
--- a/src/Command/HooksInstall.php
+++ b/src/Command/HooksInstall.php
@@ -47,7 +47,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
             }
             $this->output->writeln('<info>[skip] Git n\'est pas initialisé sur votre projet</info>');
 
-            return false;
+            return 0;
         }
 
         $hooks = $this->getHooks();
@@ -55,6 +55,8 @@ protected function execute(InputInterface $input, OutputInterface $output)
         foreach ($hooks as $hook) {
             $this->copy($hook);
         }
+
+        return 0;
     }
 
     private function getHooks()
diff --git a/src/Command/MakefileInstall.php b/src/Command/MakefileInstall.php
index cb4765e..3a6841c 100644
--- a/src/Command/MakefileInstall.php
+++ b/src/Command/MakefileInstall.php
@@ -44,7 +44,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
             $fileSystem->copy(__DIR__ . '/../../make/Makefile', $this->makefile);
             $output->writeln('<info>twc/code-quality-plugin:</info> Create Makefile');
 
-            return false;
+            return 0;
         }
 
         $content = file_get_contents($this->makefile);
@@ -53,10 +53,12 @@ protected function execute(InputInterface $input, OutputInterface $output)
         if (in_array($model, $lines)) {
             $output->writeln('<info>twc/code-quality-plugin:</info> [skip] Makefile is up to date');
 
-            return false;
+            return 0;
         }
 
         file_put_contents($this->makefile, "\n\n$model", FILE_APPEND);
         $output->writeln('<info>twc/code-quality-plugin:</info> Makefile updated');
+
+        return 0;
     }
 }
diff --git a/src/Command/QualityInstall.php b/src/Command/QualityInstall.php
index 14acb47..d062329 100644
--- a/src/Command/QualityInstall.php
+++ b/src/Command/QualityInstall.php
@@ -50,11 +50,12 @@ protected function execute(InputInterface $input, OutputInterface $output)
         if (\is_dir($this->dirQuality) && ($mode !== 'force')) {
             $output->writeln($message);
 
-            return false;
+            return 0;
         }
 
         $composerSystem->copy(__DIR__ . '/../../quality', $this->dirQuality);
         $fileSystem->chmod($this->dirQuality . '/commit-rules.sh', 0777);
         $output->writeln('<info>twc/code-quality-plugin:</info> Dossier de configuration créé');
+        return 0;
     }
 }