diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 15f8511..c96ddd3 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,6 +1,12 @@
 # Release notes
 
 
+## 0.3.1
+
+This version fixes an async error that could cause purchases to update the context on a background thread. 
+
+
+
 ## 0.3
 
 StoreKitPlus now uses Swift 5.9, which requires Xcode 15.
diff --git a/Sources/StoreKitPlus/Services/StandardStorePurchaseService.swift b/Sources/StoreKitPlus/Services/StandardStorePurchaseService.swift
index 574c1d4..d82bc6d 100644
--- a/Sources/StoreKitPlus/Services/StandardStorePurchaseService.swift
+++ b/Sources/StoreKitPlus/Services/StandardStorePurchaseService.swift
@@ -38,7 +38,9 @@ open class StandardStorePurchaseService: StorePurchaseService {
     private let context: StoreContext
     private var transactionTask: Task<Void, Error>?
 
-    open func purchase(_ product: Product) async throws -> Product.PurchaseResult {
+    open func purchase(
+        _ product: Product
+    ) async throws -> Product.PurchaseResult {
         #if os(visionOS)
         throw StoreServiceError.unsupportedPlatform("This purchase operation is not supported in visionOS: Use @Environment(\\.purchase) instead.")
         #else
@@ -114,10 +116,12 @@ private extension StandardStorePurchaseService {
         var transactions = context.purchaseTransactions
             .filter { $0.productID != transaction.productID }
         transactions.append(transaction)
-        context.purchaseTransactions = transactions
+        updateContext(with: transactions)
     }
 
     func updateContext(with transactions: [Transaction]) {
-        context.purchaseTransactions = transactions
+        DispatchQueue.main.async {
+            self.context.purchaseTransactions = transactions
+        }
     }
 }