diff --git a/README.md b/README.md
index 6f429b3..d001e86 100644
--- a/README.md
+++ b/README.md
@@ -279,22 +279,6 @@ classNames: {
 
 <strong>Usage:</strong> Classes added to HTML generated by Choices. By default classnames follow the [BEM](http://csswizardry.com/2013/01/mindbemding-getting-your-head-round-bem-syntax/) notation.
 
-### sortFunction
-<strong>Type:</strong> `Function` <strong>Default:</strong>
-
-```js
-(a, b) => {
-    const labelA = (a.label || a.value).toLowerCase();
-    const labelB = (b.label || b.value).toLowerCase();
-    if (labelA < labelB) return -1;
-    if (labelA > labelB) return 1;
-    return 0;
-}
-```
-
-<strong>Input types affected:</strong> `select-one`, `select-multiple`
-
-<strong>Usage:</strong> Function to sort options and groups. By default options and groups are sorted alphabetically.
 
 ### callbackOnInit
 <strong>Type:</strong> `Function` <strong>Default:</strong>`() => {}`