diff --git a/book/_config.yml b/book/_config.yml
index 2b6da68..ab31891 100644
--- a/book/_config.yml
+++ b/book/_config.yml
@@ -21,6 +21,8 @@ sphinx:
   - sphinx_apa_references
   - sphinx_tudelft_theme
   config:
+    sphinx_gated_directives:
+      override_existing: ['exercise']
     language: en
     html_js_files:
     - https://cdnjs.cloudflare.com/ajax/libs/require.js/2.3.4/require.min.js