# 405 Not Allowed Handler If your Slim Framework application has a route that matches the current HTTP request URI but NOT the HTTP request method, the application invokes its Not Allowed handler and returns a `HTTP/1.1 405 Not Allowed` response to the HTTP client. ## Default Not Allowed handler Each Slim Framework application has a default Not Allowed handler. This handler sets the Response status to `405`, it sets the content type to `text/html`, it adds a `Allowed:` HTTP header with a comma-delimited list of allowed HTTP methods, and it writes a simple explanation to the Response body. ## Custom Not Allowed handler A Slim Framework application’s Not Allowed handler is a Pimple service. You can substitute your own Not Allowed handler by defining a custom Pimple factory method with the application container. ~~~ // Create Slim $app = new \Slim\App(); // get the app's di-container $c = $app->getContainer(); $c['notAllowedHandler'] = function ($c) { return function ($request, $response, $methods) use ($c) { return $c['response'] ->withStatus(405) ->withHeader('Allow', implode(', ', $methods)) ->withHeader('Content-type', 'text/html') ->write('Method must be one of: ' . implode(', ', $methods)); }; ~~~ > N.B Check out [Not Found](http://www.slimframework.com/docs/handlers/not-found.html) docs for pre-slim creation method using a new instance of`\Slim\Container` In this example, we define a new `notAllowedHandler` factory that returns a callable. The returned callable accepts three arguments: 1. A `\Psr\Http\Message\ServerRequestInterface` instance 2. A `\Psr\Http\Message\ResponseInterface` instance 3. A numeric array of allowed HTTP method names The callable MUST return an appropriate `\Psr\Http\Message\ResponseInterface` instance.