diff --git a/10-dynamic-pages.md b/10-dynamic-pages.md
index 8565eb7..e2171e8 100644
--- a/10-dynamic-pages.md
+++ b/10-dynamic-pages.md
@@ -179,7 +179,7 @@ class InvalidPageException extends Exception
 
 Then in the `FilePageReader` file add this code at the end of your `readBySlug` method:
 
-```
+```php
 $path = "$this->pageFolder/$slug.md";
 
 if(!file_exists($path)) {
@@ -223,4 +223,4 @@ Try a few different URLs to check that everything is working as it should. If so
 
 And as always, don't forget to commit your changes.
 
-[<< previous](09-templating.md) | [next >>](11-page-menu.md)
\ No newline at end of file
+[<< previous](09-templating.md) | [next >>](11-page-menu.md)