diff --git a/composer.json b/composer.json
index 1dec2fd..7a36fbe 100644
--- a/composer.json
+++ b/composer.json
@@ -7,6 +7,7 @@
         "symfony/yaml":                   "^4 | ^5",
         "symfony/console":                "^4 | ^5",
         "symfony/filesystem":             "^4 | ^5",
+        "symfony/finder":                 "^4 | ^5",
         "dflydev/dot-access-data":        "^1.1.0"
     },
     "license": "MIT",
diff --git a/composer.lock b/composer.lock
index 9a4e676..969c56c 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "1f123a5a1e0ac60f3ff0af3e3bea94d7",
+    "content-hash": "a95010d0c1a48b4cc020b7c672912a74",
     "packages": [
         {
             "name": "dflydev/dot-access-data",
@@ -240,6 +240,55 @@
             "homepage": "https://symfony.com",
             "time": "2020-01-21T08:40:24+00:00"
         },
+        {
+            "name": "symfony/finder",
+            "version": "v5.0.7",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/finder.git",
+                "reference": "600a52c29afc0d1caa74acbec8d3095ca7e9910d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/finder/zipball/600a52c29afc0d1caa74acbec8d3095ca7e9910d",
+                "reference": "600a52c29afc0d1caa74acbec8d3095ca7e9910d",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.2.5"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "5.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Finder\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Finder Component",
+            "homepage": "https://symfony.com",
+            "time": "2020-03-27T16:56:45+00:00"
+        },
         {
             "name": "symfony/polyfill-ctype",
             "version": "v1.14.0",
diff --git a/src/Command/LintCommand.php b/src/Command/LintCommand.php
index a77136c..4e1ff4c 100644
--- a/src/Command/LintCommand.php
+++ b/src/Command/LintCommand.php
@@ -6,6 +6,7 @@
 use Symfony\Component\Console\Input\InputArgument;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Finder\Finder;
 use Symfony\Component\Yaml\Yaml;
 
 /**
@@ -23,11 +24,11 @@ protected function configure()
         $this
             ->setName('lint')
             ->setDescription('Validates that a given YAML file has valid syntax.')
-            ->addUsage("path/to/file.yml")
+            ->addUsage('path/to/file.yml')
             ->addArgument(
-                'filename',
+                'path',
                 InputArgument::REQUIRED,
-                "The filename of the YAML file"
+                'The path or directory of the YAML file'
             );
     }
 
@@ -39,15 +40,37 @@ protected function configure()
      */
     protected function execute(InputInterface $input, OutputInterface $output)
     {
-        $filename = $input->getArgument('filename');
-        $yaml_parsed = $this->loadYamlFile($filename);
+        $path = $input->getArgument('path');
+        $yaml_parsed = $this->loadYamlFile($path);
         if (!$yaml_parsed) {
             // Exit with a status of 1.
             return 1;
         }
 
+        if (is_dir($path)) {
+            $finder = new Finder();
+            $finder->files()->in($path);
+            foreach ($finder as $file) {
+                $yaml_parsed = $this->loadYamlFile($file->getRealPath());
+                if (!$yaml_parsed) {
+                    // Exit with a status of 1.
+                    return 1;
+                }
+            }
+        } else {
+            $yaml_parsed = $this->loadYamlFile($path);
+            if (!$yaml_parsed) {
+                // Exit with a status of 1.
+                return 1;
+            }
+        }
+
         if (OutputInterface::VERBOSITY_VERBOSE === $output->getVerbosity()) {
-            $output->writeln("<info>The file $filename contains valid YAML.</info>");
+            if (is_dir($path)) {
+                $output->writeln("<info>The directory $path contains valid YAML.</info>");
+            } else {
+                $output->writeln("<info>The file $path contains valid YAML.</info>");
+            }
         }
 
         return 0;
diff --git a/tests/phpunit/LintCommandTest.php b/tests/phpunit/LintCommandTest.php
index 79e7556..057d904 100644
--- a/tests/phpunit/LintCommandTest.php
+++ b/tests/phpunit/LintCommandTest.php
@@ -24,7 +24,7 @@ public function testLint($file, $expected_output, $expected_exit_code)
         $commandTester = new CommandTester($command);
         $commandTester->execute(array(
             'command'  => $command->getName(),
-            'filename' => $file
+            'path' => $file
         ), ['verbosity' => Output::VERBOSITY_VERBOSE]);
 
         $output = $commandTester->getDisplay();