diff --git a/LumenCors.php b/LumenCors.php
index 37cf3a0..2a5eef7 100644
--- a/LumenCors.php
+++ b/LumenCors.php
@@ -1,7 +1,8 @@
 <?php namespace palanik\lumen\Middleware;
 
 use Closure;
-use Illuminate\Http\Response;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpFoundation\Request;
 
 class LumenCors {
 
@@ -10,17 +11,29 @@ class LumenCors {
                 'allowMethods' => 'GET,HEAD,PUT,POST,DELETE,PATCH,OPTIONS',
                 );
 
+    /**
+     * Set Access-Control-Allow-Origin on Response.
+     *
+     * @param  Request  $req
+     * @return Response
+     */
     protected function setOrigin($req, $rsp) {
         $origin = $this->settings['origin'];
         if (is_callable($origin)) {
             // Call origin callback with request origin
             $origin = call_user_func($origin,
-                                    $req->header("Origin")
+                                    $req->headers->get("Origin")
                                     );
         }
-        $rsp->header('Access-Control-Allow-Origin', $origin);
+        $rsp->headers->set('Access-Control-Allow-Origin', $origin);
     }
 
+    /**
+     * Set Access-Control-Expose-Headers on Response.
+     *
+     * @param  Request  $req
+     * @return Response
+     */
     protected function setExposeHeaders($req, $rsp) {
         if (isset($this->settings['exposeHeaders'])) {
             $exposeHeaders = $this->settings['exposeHeaders'];
@@ -28,22 +41,40 @@ protected function setExposeHeaders($req, $rsp) {
                 $exposeHeaders = implode(", ", $exposeHeaders);
             }
             
-            $rsp->header('Access-Control-Expose-Headers', $exposeHeaders);
+            $rsp->headers->set('Access-Control-Expose-Headers', $exposeHeaders);
         }
     }
 
+    /**
+     * Set Access-Control-Max-Age on Response.
+     *
+     * @param  Request  $req
+     * @return Response
+     */
     protected function setMaxAge($req, $rsp) {
         if (isset($this->settings['maxAge'])) {
-            $rsp->header('Access-Control-Max-Age', $this->settings['maxAge']);
+            $rsp->headers->set('Access-Control-Max-Age', $this->settings['maxAge']);
         }
     }
 
+    /**
+     * Set Access-Control-Allow-Credentials on Response.
+     *
+     * @param  Request  $req
+     * @return Response
+     */
     protected function setAllowCredentials($req, $rsp) {
         if (isset($this->settings['allowCredentials']) && $this->settings['allowCredentials'] === True) {
-            $rsp->header('Access-Control-Allow-Credentials', 'true');
+            $rsp->headers->set('Access-Control-Allow-Credentials', 'true');
         }
     }
 
+    /**
+     * Set Access-Control-Allow-Methods on Response.
+     *
+     * @param  Request  $req
+     * @return Response
+     */
     protected function setAllowMethods($req, $rsp) {
         if (isset($this->settings['allowMethods'])) {
             $allowMethods = $this->settings['allowMethods'];
@@ -51,10 +82,16 @@ protected function setAllowMethods($req, $rsp) {
                 $allowMethods = implode(", ", $allowMethods);
             }
             
-            $rsp->header('Access-Control-Allow-Methods', $allowMethods);
+            $rsp->headers->set('Access-Control-Allow-Methods', $allowMethods);
         }
     }
 
+    /**
+     * Set Access-Control-Allow-Headers on Response.
+     *
+     * @param  Request  $req
+     * @return Response
+     */
     protected function setAllowHeaders($req, $rsp) {
         if (isset($this->settings['allowHeaders'])) {
             $allowHeaders = $this->settings['allowHeaders'];
@@ -63,14 +100,20 @@ protected function setAllowHeaders($req, $rsp) {
             }
         }
         else {  // Otherwise, use request headers
-            $allowHeaders = $req->header("Access-Control-Request-Headers");
+            $allowHeaders = $req->headers->get("Access-Control-Request-Headers");
         }
 
         if (isset($allowHeaders)) {
-            $rsp->header('Access-Control-Allow-Headers', $allowHeaders);
+            $rsp->headers->set('Access-Control-Allow-Headers', $allowHeaders);
         }
     }
 
+    /**
+     * Set all needed Cors Headers on Response.
+     *
+     * @param  Request  $req
+     * @return Response
+     */
     protected function setCorsHeaders($req, $rsp) {
 
         // http://www.html5rocks.com/static/images/cors_server_flowchart.png
@@ -92,8 +135,8 @@ protected function setCorsHeaders($req, $rsp) {
     /**
      * Handle an incoming request.
      *
-     * @param  \Illuminate\Http\Request  $request
-     * @param  \Closure  $next
+     * @param  Request $request
+     * @param  Closure $next
      * @return mixed
      */
     public function handle($request, Closure $next) {
diff --git a/composer.json b/composer.json
index 76d0a4c..32776d1 100644
--- a/composer.json
+++ b/composer.json
@@ -18,6 +18,7 @@
         }
     ],
     "require": {
+        "symfony/http-foundation": ">=3.2 <5"
     },
     "autoload": {
         "psr-4": {