diff --git a/book/exercises/001.md b/book/exercises/001.md
index a3562ea..fbc0de6 100644
--- a/book/exercises/001.md
+++ b/book/exercises/001.md
@@ -23,9 +23,9 @@ Can you add some content to the intro page?
 ```
 
 :::{card} Check your understanding
-<iframe src="https://tudelft.h5p.com/content/1292494525712285897/embed" aria-label="Testing your knowledge" width="1088" height="637" frameborder="0" allowfullscreen="allowfullscreen" allow="autoplay *; geolocation *; microphone *; camera *; midi *; encrypted-media *"></iframe><script src="https://tudelft.h5p.com/js/h5p-resizer.js" charset="UTF-8"></script>
+<iframe src="https://home.teachbooks.io/wp-admin/admin-ajax.php?action=h5p_embed&id=2" width="624" height="324" frameborder="0" allowfullscreen="allowfullscreen" title="Testing your knowledge"></iframe><script src="https://home.teachbooks.io/wp-content/plugins/h5p/h5p-php-library/js/h5p-resizer.js" charset="UTF-8"></script>
 :::
 
 :::{card} Check your understanding
-<iframe src="https://tudelft.h5p.com/content/1292493455522610637/embed" aria-label="Testing more Teachbooks knowledge" width="1088" height="637" frameborder="0" allowfullscreen="allowfullscreen" allow="autoplay *; geolocation *; microphone *; camera *; midi *; encrypted-media *"></iframe><script src="https://tudelft.h5p.com/js/h5p-resizer.js" charset="UTF-8"></script>
+<iframe src="https://home.teachbooks.io/wp-admin/admin-ajax.php?action=h5p_embed&id=1" width="959" height="502" frameborder="0" allowfullscreen="allowfullscreen" title="Testing more Teachbooks knowledge"></iframe><script src="https://home.teachbooks.io/wp-content/plugins/h5p/h5p-php-library/js/h5p-resizer.js" charset="UTF-8"></script>
 :::
\ No newline at end of file