diff --git a/README.md b/README.md
index 5c941da..a6ca634 100644
--- a/README.md
+++ b/README.md
@@ -60,7 +60,7 @@ use ndarray::array;
 use powerboxesrs::boxes::box_areas;
 let boxes = array![[1., 2., 3., 4.], [0., 0., 10., 10.]];
 let areas = box_areas(&boxes);
-assert_eq!(areas, array![9., 121.]);
+assert_eq!(areas, array![4., 100.]);
 ```
 
 
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