diff --git a/model-basics.Rmd b/model-basics.Rmd
index 4d5415f..dd1c183 100644
--- a/model-basics.Rmd
+++ b/model-basics.Rmd
@@ -156,7 +156,7 @@ summary(h)
 ### Exercises
 
 1.  What variables in `heights` do you expect to be most highly correlated with
-    income?  Use `cor()` plus `purr::map_dbl()` to check your guesses.
+    income?  Use `cor()` plus `purrr::map_dbl()` to check your guesses.
 
 1.  Correlation only summarises the linear relationship between two continuous
     variables. There are some famous drawbacks to the correlation. What