diff --git a/model-many.Rmd b/model-many.Rmd
index bbffcda..95e75f5 100644
--- a/model-many.Rmd
+++ b/model-many.Rmd
@@ -489,7 +489,7 @@ These are described in more detail below.
 
 ### List to vector
 
-If you can reduce your list column to an atomic vector then it will be a regular column. For example, you can always summarise an object with it's type and length, so this code will work regardless of what sort of list-column you have:
+If you can reduce your list column to an atomic vector then it will be a regular column. For example, you can always summarise an object with its type and length, so this code will work regardless of what sort of list-column you have:
 
 ```{r}
 df <- tribble(