diff --git a/QRCodeReader/Classes/Core/Card/CardReader.swift b/QRCodeReader/Classes/Core/Card/CardReader.swift
index 84bdac7..6debb4e 100644
--- a/QRCodeReader/Classes/Core/Card/CardReader.swift
+++ b/QRCodeReader/Classes/Core/Card/CardReader.swift
@@ -40,7 +40,7 @@ open class CardReader: BaseReader<Card> {
     
     private let videoDataOutput = AVCaptureVideoDataOutput()
 
-    init(factory: CardFactory, onUpdateRectOfInterest: (() -> Void)?) {
+    public init(factory: CardFactory, onUpdateRectOfInterest: (() -> Void)?) {
         self.factory = factory
         
         super.init(onUpdateRectOfInterest: onUpdateRectOfInterest)
diff --git a/QRCodeReader/Classes/Core/Card/Helpers/CardFactory.swift b/QRCodeReader/Classes/Core/Card/Helpers/CardFactory.swift
index fceb353..31a89c6 100644
--- a/QRCodeReader/Classes/Core/Card/Helpers/CardFactory.swift
+++ b/QRCodeReader/Classes/Core/Card/Helpers/CardFactory.swift
@@ -26,9 +26,7 @@ public struct Card {
     let number: String
 }
 
-open class CardFactory {
+public protocol CardFactory {
     
-    func create(_ values: [String]) -> Card? {
-        nil
-    }
+    func create(_ values: [String]) -> Card?
 }