Trusted proxy to version 4.0 for laravel 5.6

app/Http/Middleware/TrustProxies.php

@@ -15,15 +15,9 @@ class TrustProxies extends Middleware
     protected $proxies;
 
     /**
-     * The current proxy header mappings.
+     * The headers used to detect proxies.
      *
      * @var array
      */
-    protected $headers = [
-        Request::HEADER_FORWARDED => 'FORWARDED',
-        Request::HEADER_X_FORWARDED_FOR => 'X_FORWARDED_FOR',
-        Request::HEADER_X_FORWARDED_HOST => 'X_FORWARDED_HOST',
-        Request::HEADER_X_FORWARDED_PORT => 'X_FORWARDED_PORT',
-        Request::HEADER_X_FORWARDED_PROTO => 'X_FORWARDED_PROTO',
-    ];
+    protected $headers = Request::HEADER_X_FORWARDED_FOR;
 }

composer.json

@@ -6,7 +6,7 @@
     "type": "project",
     "require": {
         "php": ">=7.1.0",
-        "fideloper/proxy": "~3.3",
+        "fideloper/proxy": "~4.0",
         "laravel/framework": "5.6.*",
         "laravel/tinker": "~1.0"
     },