fix missing import yup package (#1641)

fix missing import yup package to improve document
jaredpalmer · Jun 27, 2019 · 4e629c9 · 4e629c9
1 parent 7ba657c
commit 4e629c9
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/docs/api/fastfield.md b/docs/api/fastfield.md
@@ -36,6 +36,7 @@ More specifically, if the `<Field />` does not change behavior or render anythin
 ```jsx
 import React from 'react';
 import { Formik, Field, FastField, Form } from 'formik';
+import * as Yup from 'yup';
 
 const Basic = () => (
   <div>