diff --git a/README.md b/README.md
index aeca0da..8618048 100644
--- a/README.md
+++ b/README.md
@@ -110,7 +110,7 @@ The number of pixels the content height can surpass the container height without
 **Default: 0**
 
 ### includePadding
-When set to true, it uses `outerWidth` and `outerHeight` for the container size instead of `width` and `height`. When your container element has non-zero padding and the scrollbar layout looks weird, this option can be helpful.  
+When set to true, it uses `innerWidth` and `innerHeight` for the container size instead of `width` and `height`. When your container element has non-zero padding and the scrollbar layout looks weird, this option can be helpful.  
 **Default: false**
 
 How to Use