diff --git a/book/_config.yml b/book/_config.yml
index 6ad58d4..d488258 100644
--- a/book/_config.yml
+++ b/book/_config.yml
@@ -43,6 +43,7 @@ sphinx:
     - download_link_replacer
     - sphinx.ext.extlinks
     - sphinx_image_inverter
+    - sphinx_iframes
     - sphinx_exercise
     - teachbooks_sphinx_tippy
 
diff --git a/book/exercises/001.md b/book/exercises/001.md
index af92980..eb7ce52 100644
--- a/book/exercises/001.md
+++ b/book/exercises/001.md
@@ -28,10 +28,12 @@ Demonstration of all steps of this exercise, video available [here](https://yout
 
 ````
 
-:::{card} Check your understanding
-<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
+```{h5p} https://home.teachbooks.io/wp-admin/admin-ajax.php?action=h5p_embed&id=2
+```
+::::
 
-:::{card} Check your understanding
-<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>
-:::
\ No newline at end of file
+::::{card} Check your understanding
+```{h5p} https://home.teachbooks.io/wp-admin/admin-ajax.php?action=h5p_embed&id=1
+```
+::::
diff --git a/requirements.txt b/requirements.txt
index 4d6bb6c..254927d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,3 +9,6 @@ teachbooks-sphinx-tippy
 # now list the packages (and the respective url) you wish to download from the GitLab package registry
 --extra-index-url https://gitlab.tudelft.nl/api/v4/projects/11239/packages/pypi/simple
 sphinx-thebe ~= 0.9.9
+
+# Now list the files you want to download directly from GitHub
+git+https://github.com/TeachBooks/sphinx-iframes.git