diff --git a/lib/credit_card_form.dart b/lib/credit_card_form.dart
index 1ea5f28..da10df8 100644
--- a/lib/credit_card_form.dart
+++ b/lib/credit_card_form.dart
@@ -90,7 +90,6 @@ class _CreditCardFormState extends State<CreditCardForm> {
       MaskedTextController(mask: '0000');
 
   FocusNode cvvFocusNode = FocusNode();
-  FocusNode cardNumberNode = FocusNode();
   FocusNode expiryDateNode = FocusNode();
   FocusNode cardHolderNode = FocusNode();