diff --git a/README.md b/README.md
index 02db9e7..037bdc7 100644
--- a/README.md
+++ b/README.md
@@ -10,39 +10,40 @@ Enables the usage of callables as stack middlewares.
 Here is a contrived example showing how a callable can be used to easily act
 as a stack middleware for a silex application:
 
-    use Symfony\Component\HttpFoundation\Request;
-    use Symfony\Component\HttpFoundation\Response;
-    use Symfony\Component\HttpKernel\HttpKernelInterface;
+```php
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\HttpKernelInterface;
 
-    $app = new Silex\Application();
+$app = new Silex\Application();
 
-    $app->get('/', function (Request $request) {
-        if ('success' === $request->attributes->get('callable_middleware')) {
-            return new Response('SUCCESS');
-        }
+$app->get('/', function (Request $request) {
+    if ('success' === $request->attributes->get('callable_middleware')) {
+        return new Response('SUCCESS');
+    }
 
-        return new Response('FAILED', 500);
-    });
+    return new Response('FAILED', 500);
+});
 
-    $inlineMiddleware = function(
-        HttpKernelInterface $app,
-        Request $request,
-        $type = HttpKernelInterface::MASTER_REQUEST,
-        $catch = true
-    ) {
-        $request->attributes->set('callable_middleware', 'success');
+$inlineMiddleware = function(
+    HttpKernelInterface $app,
+    Request $request,
+    $type = HttpKernelInterface::MASTER_REQUEST,
+    $catch = true
+) {
+    $request->attributes->set('callable_middleware', 'success');
 
-        $response = $app->handle($request, $type, $catch);
-        $response->setContent('['.$response->getContent().']');
+    $response = $app->handle($request, $type, $catch);
+    $response->setContent('['.$response->getContent().']');
 
-        return $response;
-    };
+    return $response;
+};
 
-    $stack = (new Stack\Builder())
-        ->push('Stack\Inline', $inlineMiddleware);
-
-    $app = $stack->resolve($app);
+$stack = (new Stack\Builder())
+    ->push('Stack\Inline', $inlineMiddleware);
 
+$app = $stack->resolve($app);
+```
 
 ## Usage
 
@@ -50,11 +51,13 @@ The method signature for the callable is similar to `HttpKernelInterface::handle
 except that it requires an `HttpKernelInterface` instance as its first argument.
 A simple passthru inline middleware would look like this:
 
-    $app = new Stack\Inline($app, function(
-        HttpKernelInterface $app,
-        Request $request,
-        $type = HttpKernelInterface::MASTER_REQUEST,
-        $catch = true
-    ) {
-        return $app->handle($request, $type, $catch);
-    });
+```php
+$app = new Stack\Inline($app, function(
+    HttpKernelInterface $app,
+    Request $request,
+    $type = HttpKernelInterface::MASTER_REQUEST,
+    $catch = true
+) {
+    return $app->handle($request, $type, $catch);
+});
+```