diff --git a/ext-springs.qmd b/ext-springs.qmd
index 5269f310..cfffb654 100644
--- a/ext-springs.qmd
+++ b/ext-springs.qmd
@@ -408,6 +408,7 @@ stat_spring <- function(mapping = NULL,
 Now that everything is in place, we can test out our new layer:
 
 ```{r}
+set.seed(123)
 df <- tibble(
   x = runif(5, max = 10),
   y = runif(5, max = 10),