diff --git a/05-router.md b/05-router.md
index d635a58..fda5b22 100644
--- a/05-router.md
+++ b/05-router.md
@@ -12,7 +12,7 @@ Alternative packages: [symfony/Routing](https://github.com/symfony/Routing), [Au
 
 By now you know how to install Composer packages, so I will leave that to you.
 
-Now add this code block to your `Bootstrap.php` file where you added the 'hello world' message in the last part.
+Now add this code block to your `Bootstrap.php` file where you added the 'hello world' message in the last chapter.
 
 ```php
 $dispatcher = \FastRoute\simpleDispatcher(function (\FastRoute\RouteCollector $r) {
@@ -49,7 +49,7 @@ This setup might work for really small applications, but once you start adding a
 Create a `Routes.php` file in the `src/` folder. It should look like this:
 
 ```php
-<?php
+<?php declare(strict_types = 1);
 
 return [
     ['GET', '/hello-world', function () {
@@ -61,7 +61,7 @@ return [
 ];
 ```
 
-Now let's rewrite the route collection part to use the `Routes.php` file.
+Now let's rewrite the route dispatcher part to use the `Routes.php` file.
 
 ```php
 $routeDefinitionCallback = function (\FastRoute\RouteCollector $r) {
@@ -76,4 +76,6 @@ $dispatcher = \FastRoute\simpleDispatcher($routeDefinitionCallback);
 
 This is already an improvement, but now all the handler code is in the `Routes.php` file. This is not optimal, so let's fix that in the next part.
 
+Don't forget to commit your changes at the end of each chapter.
+
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