diff --git a/6-controllers.md b/6-controllers.md
index ca18500..99a41a1 100644
--- a/6-controllers.md
+++ b/6-controllers.md
@@ -6,7 +6,7 @@ When I talk about a controller in this tutorial then I am just referring to a cl
 
 Create a new folder inside the `src/` folder with the name `HelloWorld`. This will be where all your hello world related code will end up in. In there, create `HelloWorldController.php`.
 
-```
+```php
 <?php
 
 namespace Example\HelloWorld;
@@ -24,7 +24,7 @@ The autoloader will only work if the namespace of a class matches the file path
 
 Now let's change the hello world route so that it calls your new controller method instead of the closure. Change your `Routes.php` to this:
 
-```
+```php
 return [
     ['GET', '/hello-world', [
         'Example\HelloWorld\HelloWorldController', 
@@ -37,7 +37,7 @@ Instead of just a callable you are now passing an array. The first value is the
 
 To make this work, you will also have to do a small refactor to the routing part of the `Bootstrap.php`:
 
-```
+```php
 case \FastRoute\Dispatcher::FOUND:
     $className = $routeInfo[1][0];
     $method = $routeInfo[1][1];
diff --git a/7-inversion-of-control.md b/7-inversion-of-control.md
index b836e22..2454758 100644
--- a/7-inversion-of-control.md
+++ b/7-inversion-of-control.md
@@ -10,7 +10,7 @@ If it sounds a little complicated right now, don't worry. Just follow the tutori
 
 Change your `HelloWorldController` to the following:
 
-```
+```php
 <?php
 
 namespace Example\HelloWorld;
@@ -39,7 +39,7 @@ In the contructor you are now explicitly asking for a `Http\Response`. In this c
 
 Now the code will result in an error because you are not actually injecting anything. So let's fix that in your `Bootstrap.php` where you dispatch when a route was found:
 
-```
+```php
 $class = new $className($response);
 $class->$method($vars);
 ```
diff --git a/8-dependency-injector.md b/8-dependency-injector.md
index 8ef7e8a..2290598 100644
--- a/8-dependency-injector.md
+++ b/8-dependency-injector.md
@@ -5,7 +5,6 @@
 A dependency injector resolves the dependencies of your class and makes sure that the correct objects are injected when the class is instantiated.
 
 My favorite injector is [Auryn](https://github.com/rdlowrey/Auryn), so install `rdlowrey/auryn` with composer or use one of the alternatives below:
-
 [Pimple](http://pimple.sensiolabs.org/), [Orno DI](https://github.com/orno/di), [PHP-DI](https://github.com/mnapoli/PHP-DI)
 
 Create a new file called `Dependencies.php` in your `src/` folder. In there add the following content: