diff --git a/Pod/Classes/UI/CardTextField.swift b/Pod/Classes/UI/CardTextField.swift
index 845ee30..c0b863b 100644
--- a/Pod/Classes/UI/CardTextField.swift
+++ b/Pod/Classes/UI/CardTextField.swift
@@ -24,7 +24,7 @@ import UIKit
  */
 open class CardTextField: UITextField, NumberInputTextFieldDelegate {
     
-    // MARK: - open variables
+    // MARK: - Public variables
     
     /**
     The image view which is used to display the detected card type.