diff --git a/CardParts/src/Classes/CardsViewController.swift b/CardParts/src/Classes/CardsViewController.swift
index 394b9ed9..f2afcde7 100644
--- a/CardParts/src/Classes/CardsViewController.swift
+++ b/CardParts/src/Classes/CardsViewController.swift
@@ -463,7 +463,7 @@ extension CardsViewController {
     }
     
     // calls for visibility of card when the scroll view scrolls
-    public func scrollViewDidScroll(_ scrollView: UIScrollView) {
+    open func scrollViewDidScroll(_ scrollView: UIScrollView) {
         notifyCardsVisibility()
     }
 }