diff --git a/mkdocs.yml b/mkdocs.yml
index d7dbb8ca7fc06a15dd5c734f635702db74087d94..93dbfe6fcf5cfad3bbc7fba1f395ce5fb9ad2a69 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -30,6 +30,7 @@ nav:
   - Attic:
     - Magnetism: 'lecture_8.md'
     - Fermi surface periodic table: 'fermi_surfaces.md'
+    - Extra exercises: 'extra_exercises.md'
 
 theme:
   name: material