diff --git a/Parchment/Classes/PagingBorderLayoutAttributes.swift b/Parchment/Classes/PagingBorderLayoutAttributes.swift
index 57f5aad..982d956 100644
--- a/Parchment/Classes/PagingBorderLayoutAttributes.swift
+++ b/Parchment/Classes/PagingBorderLayoutAttributes.swift
@@ -1,8 +1,8 @@
 import UIKit
 
 open class PagingBorderLayoutAttributes: UICollectionViewLayoutAttributes {
-    open var backgroundColor: UIColor?
-    open var insets: UIEdgeInsets = UIEdgeInsets()
+    nonisolated(unsafe) open var backgroundColor: UIColor?
+    nonisolated(unsafe) open var insets: UIEdgeInsets = UIEdgeInsets()
 
     open override func copy(with zone: NSZone? = nil) -> Any {
         let copy = super.copy(with: zone) as! PagingBorderLayoutAttributes
diff --git a/Parchment/Classes/PagingCellLayoutAttributes.swift b/Parchment/Classes/PagingCellLayoutAttributes.swift
index 4db5703..05a4b01 100644
--- a/Parchment/Classes/PagingCellLayoutAttributes.swift
+++ b/Parchment/Classes/PagingCellLayoutAttributes.swift
@@ -3,7 +3,7 @@ import UIKit
 /// A custom `UICollectionViewLayoutAttributes` subclass that adds a
 /// `progress` property indicating how far the user has scrolled.
 open class PagingCellLayoutAttributes: UICollectionViewLayoutAttributes {
-    open var progress: CGFloat = 0.0
+    nonisolated(unsafe) open var progress: CGFloat = 0.0
 
     open override func copy(with zone: NSZone? = nil) -> Any {
         let copy = super.copy(with: zone) as! PagingCellLayoutAttributes
diff --git a/Parchment/Classes/PagingIndicatorLayoutAttributes.swift b/Parchment/Classes/PagingIndicatorLayoutAttributes.swift
index 253a09f..df76c72 100644
--- a/Parchment/Classes/PagingIndicatorLayoutAttributes.swift
+++ b/Parchment/Classes/PagingIndicatorLayoutAttributes.swift
@@ -1,7 +1,7 @@
 import UIKit
 
 open class PagingIndicatorLayoutAttributes: UICollectionViewLayoutAttributes {
-    open var backgroundColor: UIColor?
+    nonisolated(unsafe) open var backgroundColor: UIColor?
 
     open override func copy(with zone: NSZone? = nil) -> Any {
         let copy = super.copy(with: zone) as! PagingIndicatorLayoutAttributes