diff --git a/Sources/Purchasing/StoreKitAbstractions/SK1Storefront.swift b/Sources/Purchasing/StoreKitAbstractions/SK1Storefront.swift
index 40ec0b1000..944519641d 100644
--- a/Sources/Purchasing/StoreKitAbstractions/SK1Storefront.swift
+++ b/Sources/Purchasing/StoreKitAbstractions/SK1Storefront.swift
@@ -29,3 +29,9 @@ internal struct SK1Storefront: StorefrontType {
     let countryCode: String
 
 }
+
+#if swift(<5.7)
+// `SKStorefront` isn't `Sendable` until iOS 16.0 / Swift 5.7
+@available(iOS 13.0, macOS 10.15, tvOS 13.0, watchOS 6.2, macCatalyst 13.1, *)
+extension SK1Storefront: @unchecked Sendable {}
+#endif
diff --git a/Sources/Purchasing/StoreKitAbstractions/SK2Storefront.swift b/Sources/Purchasing/StoreKitAbstractions/SK2Storefront.swift
index 278b1cf127..11b3a5583d 100644
--- a/Sources/Purchasing/StoreKitAbstractions/SK2Storefront.swift
+++ b/Sources/Purchasing/StoreKitAbstractions/SK2Storefront.swift
@@ -29,3 +29,9 @@ internal struct SK2Storefront: StorefrontType {
     let countryCode: String
 
 }
+
+#if swift(<5.7)
+// `SKStorefront` isn't `Sendable` until iOS 16.0 / Swift 5.7
+@available(iOS 15.0, tvOS 15.0, watchOS 8.0, macOS 12.0, *)
+extension SK2Storefront: @unchecked Sendable {}
+#endif