diff --git a/numbers.qmd b/numbers.qmd
index 5f1e9d6..54ca041 100644
--- a/numbers.qmd
+++ b/numbers.qmd
@@ -373,7 +373,7 @@ x <- 1:10
 cumsum(x)
 ```
 
-If you need more complex rolling or sliding aggregates, try the [slider](https://davisvaughan.github.io/slider/) package by Davis Vaughan.
+If you need more complex rolling or sliding aggregates, try the [slider](https://slider.r-lib.org/) package by Davis Vaughan.
 
 ### Exercises