diff --git a/Sources/SafariView/DismissButtonStyle.swift b/Sources/SafariView/DismissButtonStyle.swift
index a7a5069f5..d71de95d2 100644
--- a/Sources/SafariView/DismissButtonStyle.swift
+++ b/Sources/SafariView/DismissButtonStyle.swift
@@ -25,6 +25,7 @@
 
 import SafariServices
 
+@available(iOS 14.0, macCatalyst 14.0, *)
 public extension SafariView {
 
     /// An enumeration describing the various dismiss buttons styles available in a ``SafariView``
diff --git a/Sources/WebAuthentication/Modifiers.swift b/Sources/WebAuthentication/Modifiers.swift
index 9d9edfcef..1d76e51c9 100644
--- a/Sources/WebAuthentication/Modifiers.swift
+++ b/Sources/WebAuthentication/Modifiers.swift
@@ -25,6 +25,7 @@
 
 import SwiftUI
 
+@available(iOS 14.0, macCatalyst 14.0, *)
 public extension View {
 
     /// Set the private authentication requirements for authentication sessions within this view.
diff --git a/Sources/WebAuthentication/Presentation.swift b/Sources/WebAuthentication/Presentation.swift
index 237e23de7..7afe4b0a6 100644
--- a/Sources/WebAuthentication/Presentation.swift
+++ b/Sources/WebAuthentication/Presentation.swift
@@ -25,6 +25,7 @@
 
 import SwiftUI
 
+@available(iOS 14.0, macCatalyst 14.0, *)
 public extension View {
 
     /// Presents a ``WebAuthentication`` when a binding to a Boolean value that you provide is `true`.
diff --git a/Sources/WebAuthentication/WebAuthentication.swift b/Sources/WebAuthentication/WebAuthentication.swift
index bdc2f7445..c9e4ad767 100644
--- a/Sources/WebAuthentication/WebAuthentication.swift
+++ b/Sources/WebAuthentication/WebAuthentication.swift
@@ -27,6 +27,7 @@ import AuthenticationServices
 import SwiftUI
 
 /// A wrapper for `ASWebAuthenticationSession` in SwiftUI
+@available(iOS 14.0, macCatalyst 14.0, *)
 public struct WebAuthentication {
 
     // MARK: - Initializers