Update \'README\' with new callback usage

uphold · Oct 30, 2020 · 4fdd08a · 4fdd08a
1 parent 657b8d6
commit 4fdd08a
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/README.md b/README.md
@@ -103,7 +103,7 @@ Allows you to add custom rules by giving a callback function and a custom class.
 
 #### Arguments
 - `callback` (required) - the callback function.
-- `customClass` (optional) - the name of the class.
+- `customClass` (required) - the name of the class.
 
 ### CreditCard
 Tests if the value is a valid credit card number using the Luhn10 algorithm.