diff --git a/mkdocs.yml b/mkdocs.yml
index 5f1888964824c70bb26ef3dcb0de27d787cb7e98..6775c56ca82ee3d76880f3410ddd06b97bcaf4ac 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -48,7 +48,7 @@ nav:
     - Nearly free electron model: '11_nearly_free_electron_model_solutions.md'
     - Band structures in 2D: '12_band_structures_in_higher_dimensions_solutions.md'
     - Basic principles: '13_semiconductors_solutions.md'
-    # - Doping and devices: '14_doping_and_devices_solutions.md'
+    - Doping and devices: '14_doping_and_devices_solutions.md'
 
 theme:
   name: material