Updating after session expiration to avoid Error 419

You can use the refresh_token method provided by the Illuminate\Foundation\Http\Middleware\VerifyCsrfToken middleware. This method will generate a new CSRF token and store it in the session.

public function handle($request, Closure $next)
{
    if ($this->isReading($request) || $this->tokensMatch($request)) {
        return $this->addCookieToResponse($request, $next($request));
    }

    if ($request->session()->token() != $request->input('_token')) {
        $request->session()->refresh_token();
    }

    throw new TokenMismatchException;
}

You can also use the refresh_token method in your controller or routes to manually generate a new CSRF token.

public function update(Request $request)
{
    $request->session()->refresh_token();

    // Do something
}