diff --git a/README.md b/README.md
index 0f9b3bdd..c66fe6ee 100644
--- a/README.md
+++ b/README.md
@@ -105,8 +105,8 @@ extension MyViewController: ShopifyCheckoutDelegate {
 
 	/// Issued when checkout is no longer available and will no longer be available with the checkout url supplied.
 	/// This may happen when the user has paused on checkout for a long period (hours) and then attempted to proceed again with the same checkout url
-	/// In event of checkoutNotAvailable, a new checkout url will need to be generated
-	case checkoutNotAvailable(message: String)
+	/// In event of checkoutUnavailable, a new checkout url will need to be generated
+	case checkoutUnavailable(message: String)
   }
 
   func checkoutDidClickLink(url: URL) {
diff --git a/Samples/MobileBuyIntegration/MobileBuyIntegration/CartViewController.swift b/Samples/MobileBuyIntegration/MobileBuyIntegration/CartViewController.swift
index 56a51e50..899bc9f6 100644
--- a/Samples/MobileBuyIntegration/MobileBuyIntegration/CartViewController.swift
+++ b/Samples/MobileBuyIntegration/MobileBuyIntegration/CartViewController.swift
@@ -173,7 +173,7 @@ extension CartViewController: CheckoutDelegate {
 	func checkoutDidFail(error: ShopifyCheckout.CheckoutError) {
 		switch error {
 		case .sdkError(let underlying): print(#function, underlying)
-		case .checkoutNotAvailable(let message): forceCloseCheckout(message)
+		case .checkoutUnavailable(let message): forceCloseCheckout(message)
 		case .serverError(let message): forceCloseCheckout(message)
 		}
 	}
diff --git a/Sources/ShopifyCheckout/CheckoutBridge.swift b/Sources/ShopifyCheckout/CheckoutBridge.swift
index 0144426d..f9494b84 100644
--- a/Sources/ShopifyCheckout/CheckoutBridge.swift
+++ b/Sources/ShopifyCheckout/CheckoutBridge.swift
@@ -56,7 +56,7 @@ extension CheckoutBridge {
 	enum WebEvent: Decodable {
 		case checkoutComplete
 		case checkoutCanceled
-		case checkoutNotAvailable
+		case checkoutUnavailable
 		case unsupported(String)
 
 		enum CodingKeys: String, CodingKey {
@@ -75,7 +75,7 @@ extension CheckoutBridge {
 			case "close":
 				self = .checkoutCanceled
 			case "error":
-				self = .checkoutNotAvailable
+				self = .checkoutUnavailable
 			default:
 				self = .unsupported(name)
 			}
diff --git a/Sources/ShopifyCheckout/CheckoutError.swift b/Sources/ShopifyCheckout/CheckoutError.swift
index 1f5877ac..1e69c5c0 100644
--- a/Sources/ShopifyCheckout/CheckoutError.swift
+++ b/Sources/ShopifyCheckout/CheckoutError.swift
@@ -35,6 +35,6 @@ public enum CheckoutError: Swift.Error {
 
 	/// Issued when checkout is no longer available and will no longer be available with the checkout url supplied.
 	/// This may happen when the user has paused on checkout for a long period (hours) and then attempted to proceed again with the same checkout url
-	/// In event of checkoutNotAvailable, a new checkout url will need to be generated
-	case checkoutNotAvailable(message: String)
+	/// In event of checkoutUnavailable, a new checkout url will need to be generated
+	case checkoutUnavailable(message: String)
 }
diff --git a/Sources/ShopifyCheckout/CheckoutView.swift b/Sources/ShopifyCheckout/CheckoutView.swift
index c8759ca2..6975b299 100644
--- a/Sources/ShopifyCheckout/CheckoutView.swift
+++ b/Sources/ShopifyCheckout/CheckoutView.swift
@@ -101,9 +101,9 @@ extension CheckoutView: WKScriptMessageHandler {
 			case .checkoutComplete:
 				CheckoutView.cache = nil
 				viewDelegate?.checkoutViewDidCompleteCheckout()
-			case .checkoutNotAvailable:
+			case .checkoutUnavailable:
 				CheckoutView.cache = nil
-				viewDelegate?.checkoutViewDidFailWithError(error: .checkoutNotAvailable(message: "Checkout not available."))
+				viewDelegate?.checkoutViewDidFailWithError(error: .checkoutUnavailable(message: "Checkout unavailable."))
 			default:
 				()
 			}
@@ -149,7 +149,7 @@ extension CheckoutView: WKNavigationDelegate {
 				}
 			}()
 
-			viewDelegate?.checkoutViewDidFailWithError(error: .checkoutNotAvailable(message: message))
+			viewDelegate?.checkoutViewDidFailWithError(error: .checkoutUnavailable(message: message))
 			return .cancel
 		}
 
diff --git a/Tests/ShopifyCheckoutTests/CheckoutBridgeTests.swift b/Tests/ShopifyCheckoutTests/CheckoutBridgeTests.swift
index b4e0a6ee..1c533fbc 100644
--- a/Tests/ShopifyCheckoutTests/CheckoutBridgeTests.swift
+++ b/Tests/ShopifyCheckoutTests/CheckoutBridgeTests.swift
@@ -98,7 +98,7 @@ class CheckoutBridgeTests: XCTestCase {
 		}
 	}
 
-	func testDecodeSupportsCheckoutNotAvailableEvent() throws {
+	func testDecodeSupportsCheckoutUnavailableEvent() throws {
 		let mock = WKScriptMessageMock(body: """
 		{
 			"name": "error"
@@ -107,8 +107,8 @@ class CheckoutBridgeTests: XCTestCase {
 
 		let result = try CheckoutBridge.decode(mock)
 
-		guard case CheckoutBridge.WebEvent.checkoutNotAvailable = result else {
-			return XCTFail("expected CheckoutScriptMessage.checkoutNotAvailable, got \(result)")
+		guard case CheckoutBridge.WebEvent.checkoutUnavailable = result else {
+			return XCTFail("expected CheckoutScriptMessage.checkoutUnavailable, got \(result)")
 		}
 	}
 }