Update middleware.

app/Http/Kernel.php

@@ -16,7 +16,7 @@ class Kernel extends HttpKernel {
 		'Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse',
 		'Illuminate\Session\Middleware\StartSession',
 		'Illuminate\View\Middleware\ShareErrorsFromSession',
-		'App\Http\Middleware\VerifyCsrfToken',
+		'Illuminate\Foundation\Http\Middleware\VerifyCsrfToken',
 	];
 
 	/**

app/Http/Middleware/VerifyCsrfToken.php

-<?php namespace App\Http\Middleware;
-
-use Closure;
-use Illuminate\Contracts\Routing\Middleware;
-use Illuminate\Session\TokenMismatchException;
-
-class VerifyCsrfToken implements Middleware {
-
-	/**
-	 * Handle an incoming request.
-	 *
-	 * @param  \Illuminate\Http\Request  $request
-	 * @param  \Closure  $next
-	 * @return mixed
-	 *
-	 * @throws TokenMismatchException
-	 */
-	public function handle($request, Closure $next)
-	{
-		if ($this->isReading($request) || $this->tokensMatch($request))
-		{
-			return $next($request);
-		}
-
-		throw new TokenMismatchException;
-	}
-
-	/**
-	 * Determine if the session and input CSRF tokens match.
-	 *
-	 * @param  \Illuminate\Http\Request  $request
-	 * @return bool
-	 */
-	protected function tokensMatch($request)
-	{
-		return $request->session()->token() === $request->input('_token');
-	}
-
-	/**
-	 * Determine if the HTTP request uses a ‘read’ verb.
-	 *
-	 * @param  \Illuminate\Http\Request  $request
-	 * @return bool
-	 */
-	protected function isReading($request)
-	{
-		return in_array($request->method(), ['HEAD', 'GET', 'OPTIONS']);
-	}
-
-}