README.md in africastalking-ruby-2.1.2 vs README.md in africastalking-ruby-2.1.3

@@ -342,10 +342,10 @@
     - `recipients`: A list of recipients. Each recipient has:
 
         - `phoneNumber`: Customer phone number (in international format). `REQUIRED`
         - `quantity`: Mobile data amount. `REQUIRED`
         - `unit`: Mobile data unit. Can either be `MB` or `GB`. `REQUIRED`
-        - `validity`: How long the mobile data is valid for. Must be one of `Daily`, `Weekly` and `Monthly`. `REQUIRED`
+        - `validity`: How long the mobile data is valid for. Must be one of `Day`, `Week` and `Month`. `REQUIRED`
         - `metadata`: Additional data to associate with the transaction. `REQUIRED`
 
 #### Wallet Transfer
 ```ruby
 payments.walletTransfer options