diff --git a/composer.json b/composer.json
index 204747f..2d397c7 100644
--- a/composer.json
+++ b/composer.json
@@ -27,6 +27,7 @@
         "vimeo/psalm": "3.10.1",
         "sylius-labs/coding-standard": "^3.0",
         "symfony/browser-kit": "^4.4|^5.0",
+        "symfony/dotenv": "^4.4|^5.0",
         "symfony/framework-bundle": "^4.4|^5.0",
         "symfony/process": "^4.4|^5.0",
         "symfony/yaml": "^4.4|^5.0"
diff --git a/src/ServiceContainer/SymfonyExtension.php b/src/ServiceContainer/SymfonyExtension.php
index e27a8e1..7b0ae25 100644
--- a/src/ServiceContainer/SymfonyExtension.php
+++ b/src/ServiceContainer/SymfonyExtension.php
@@ -22,6 +22,8 @@
 use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\Parameter;
 use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\Dotenv\Dotenv;
+use Symfony\Component\Dotenv\Exception\PathException;
 
 final class SymfonyExtension implements Extension
 {
@@ -75,6 +77,10 @@ public function load(ContainerBuilder $container, array $config): void
 
         $this->loadBootstrap($this->autodiscoverBootstrap($config['bootstrap']));
 
+        if (empty($config['bootstrap'])) {
+            $this->loadEnv($config);
+        }
+
         $this->loadKernel($container, $this->autodiscoverKernelConfiguration($config['kernel']));
         $this->loadDriverKernel($container);
 
@@ -182,6 +188,17 @@ private function loadBootstrap(?string $bootstrap): void
         require_once $bootstrap;
     }
 
+    private function loadEnv(array $config)
+    {
+        $env = $config['environment'] ?? $_SERVER['APP_ENV'] ?? $_ENV['APP_ENV'] ?? 'test';
+
+        try {
+            (new Dotenv())->bootEnv(basename(dirname(__DIR__)) . '/../.env', $env);
+        } catch (PathException $exception) {
+            return;
+        }
+    }
+
     private function fallbackToTestEnvironment(): void
     {
         // If there's no defined server / environment variable with an environment, default to test