diff --git a/quarto.qmd b/quarto.qmd
index 371484c..297234b 100644
--- a/quarto.qmd
+++ b/quarto.qmd
@@ -605,6 +605,7 @@ For example, here the `processed_data` chunk depends on the `raw-data` chunk:
 
 ``` {{r}}
 #| label: raw-data
+#| cache: true
 
 rawdata <- readr::read_csv("a_very_large_file.csv")
 ```
@@ -642,6 +643,7 @@ Then you can write:
 
 ``` {{r}}
 #| label: raw-data
+#| cache: true
 #| cache.extra: !expr file.mtime("a_very_large_file.csv")
 
 rawdata <- readr::read_csv("a_very_large_file.csv")