diff --git a/src/3_drude_model.md b/src/3_drude_model.md
index aed19016317a48f5d52c7945aafc5d2e7df14fb8..1db372a5973e733561e181cea7e44e2705f9e7bb 100644
--- a/src/3_drude_model.md
+++ b/src/3_drude_model.md
@@ -9,8 +9,7 @@ configure_plotting()
 ```
 
 # Drude theory and the free electron model
-_(based on chapters 3–4 of the book)_  
-Exercises 3.1, 3.3, 4.2, 4.5, 4.6, 4.7
+_(based on chapter 3 of the book)_  
 
 !!! summary "Learning goals"