diff --git a/packages/in_app_purchase/in_app_purchase_android/CHANGELOG.md b/packages/in_app_purchase/in_app_purchase_android/CHANGELOG.md
index 7a998d0547de..10c77cb6b4d3 100644
--- a/packages/in_app_purchase/in_app_purchase_android/CHANGELOG.md
+++ b/packages/in_app_purchase/in_app_purchase_android/CHANGELOG.md
@@ -1,3 +1,7 @@
+## NEXT
+
+* Update dev_dependency `build_runner` to ^2.0.0 and `json_serializable` to ^5.0.2.
+
 ## 0.1.4+7
 
 * Ensure that the `SkuDetailsWrapper.introductoryPriceMicros` is populated correctly.
diff --git a/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/enum_converters.dart b/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/enum_converters.dart
index 7ff333098fcc..931d92f7b1e7 100644
--- a/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/enum_converters.dart
+++ b/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/enum_converters.dart
@@ -132,6 +132,7 @@ class BillingClientFeatureConverter
 }
 
 // Define a class so we generate serializer helper methods for the enums
+// See https://github.com/google/json_serializable.dart/issues/778
 @JsonSerializable()
 class _SerializedEnums {
   late BillingResponse response;
diff --git a/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/enum_converters.g.dart b/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/enum_converters.g.dart
index 8d667d035196..fe92f56653e4 100644
--- a/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/enum_converters.g.dart
+++ b/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/enum_converters.g.dart
@@ -6,19 +6,16 @@ part of 'enum_converters.dart';
 // JsonSerializableGenerator
 // **************************************************************************
 
-_SerializedEnums _$_SerializedEnumsFromJson(Map json) {
-  return _SerializedEnums()
-    ..response = _$enumDecode(_$BillingResponseEnumMap, json['response'])
-    ..type = _$enumDecode(_$SkuTypeEnumMap, json['type'])
-    ..purchaseState =
-        _$enumDecode(_$PurchaseStateWrapperEnumMap, json['purchaseState'])
-    ..prorationMode =
-        _$enumDecode(_$ProrationModeEnumMap, json['prorationMode'])
-    ..billingClientFeature = _$enumDecode(
-        _$BillingClientFeatureEnumMap, json['billingClientFeature']);
-}
+_SerializedEnums _$SerializedEnumsFromJson(Map json) => _SerializedEnums()
+  ..response = _$enumDecode(_$BillingResponseEnumMap, json['response'])
+  ..type = _$enumDecode(_$SkuTypeEnumMap, json['type'])
+  ..purchaseState =
+      _$enumDecode(_$PurchaseStateWrapperEnumMap, json['purchaseState'])
+  ..prorationMode = _$enumDecode(_$ProrationModeEnumMap, json['prorationMode'])
+  ..billingClientFeature =
+      _$enumDecode(_$BillingClientFeatureEnumMap, json['billingClientFeature']);
 
-Map<String, dynamic> _$_SerializedEnumsToJson(_SerializedEnums instance) =>
+Map<String, dynamic> _$SerializedEnumsToJson(_SerializedEnums instance) =>
     <String, dynamic>{
       'response': _$BillingResponseEnumMap[instance.response],
       'type': _$SkuTypeEnumMap[instance.type],
diff --git a/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/purchase_wrapper.g.dart b/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/purchase_wrapper.g.dart
index 5607dbdd8cb2..b5d9fe8cd3af 100644
--- a/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/purchase_wrapper.g.dart
+++ b/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/purchase_wrapper.g.dart
@@ -6,24 +6,22 @@ part of 'purchase_wrapper.dart';
 // JsonSerializableGenerator
 // **************************************************************************
 
-PurchaseWrapper _$PurchaseWrapperFromJson(Map json) {
-  return PurchaseWrapper(
-    orderId: json['orderId'] as String? ?? '',
-    packageName: json['packageName'] as String? ?? '',
-    purchaseTime: json['purchaseTime'] as int? ?? 0,
-    purchaseToken: json['purchaseToken'] as String? ?? '',
-    signature: json['signature'] as String? ?? '',
-    sku: json['sku'] as String? ?? '',
-    isAutoRenewing: json['isAutoRenewing'] as bool,
-    originalJson: json['originalJson'] as String? ?? '',
-    developerPayload: json['developerPayload'] as String?,
-    isAcknowledged: json['isAcknowledged'] as bool? ?? false,
-    purchaseState:
-        const PurchaseStateConverter().fromJson(json['purchaseState'] as int?),
-    obfuscatedAccountId: json['obfuscatedAccountId'] as String?,
-    obfuscatedProfileId: json['obfuscatedProfileId'] as String?,
-  );
-}
+PurchaseWrapper _$PurchaseWrapperFromJson(Map json) => PurchaseWrapper(
+      orderId: json['orderId'] as String? ?? '',
+      packageName: json['packageName'] as String? ?? '',
+      purchaseTime: json['purchaseTime'] as int? ?? 0,
+      purchaseToken: json['purchaseToken'] as String? ?? '',
+      signature: json['signature'] as String? ?? '',
+      sku: json['sku'] as String? ?? '',
+      isAutoRenewing: json['isAutoRenewing'] as bool,
+      originalJson: json['originalJson'] as String? ?? '',
+      developerPayload: json['developerPayload'] as String?,
+      isAcknowledged: json['isAcknowledged'] as bool? ?? false,
+      purchaseState: const PurchaseStateConverter()
+          .fromJson(json['purchaseState'] as int?),
+      obfuscatedAccountId: json['obfuscatedAccountId'] as String?,
+      obfuscatedProfileId: json['obfuscatedProfileId'] as String?,
+    );
 
 Map<String, dynamic> _$PurchaseWrapperToJson(PurchaseWrapper instance) =>
     <String, dynamic>{
@@ -43,16 +41,15 @@ Map<String, dynamic> _$PurchaseWrapperToJson(PurchaseWrapper instance) =>
       'obfuscatedProfileId': instance.obfuscatedProfileId,
     };
 
-PurchaseHistoryRecordWrapper _$PurchaseHistoryRecordWrapperFromJson(Map json) {
-  return PurchaseHistoryRecordWrapper(
-    purchaseTime: json['purchaseTime'] as int? ?? 0,
-    purchaseToken: json['purchaseToken'] as String? ?? '',
-    signature: json['signature'] as String? ?? '',
-    sku: json['sku'] as String? ?? '',
-    originalJson: json['originalJson'] as String? ?? '',
-    developerPayload: json['developerPayload'] as String?,
-  );
-}
+PurchaseHistoryRecordWrapper _$PurchaseHistoryRecordWrapperFromJson(Map json) =>
+    PurchaseHistoryRecordWrapper(
+      purchaseTime: json['purchaseTime'] as int? ?? 0,
+      purchaseToken: json['purchaseToken'] as String? ?? '',
+      signature: json['signature'] as String? ?? '',
+      sku: json['sku'] as String? ?? '',
+      originalJson: json['originalJson'] as String? ?? '',
+      developerPayload: json['developerPayload'] as String?,
+    );
 
 Map<String, dynamic> _$PurchaseHistoryRecordWrapperToJson(
         PurchaseHistoryRecordWrapper instance) =>
@@ -65,21 +62,20 @@ Map<String, dynamic> _$PurchaseHistoryRecordWrapperToJson(
       'developerPayload': instance.developerPayload,
     };
 
-PurchasesResultWrapper _$PurchasesResultWrapperFromJson(Map json) {
-  return PurchasesResultWrapper(
-    responseCode:
-        const BillingResponseConverter().fromJson(json['responseCode'] as int?),
-    billingResult:
-        BillingResultWrapper.fromJson((json['billingResult'] as Map?)?.map(
-      (k, e) => MapEntry(k as String, e),
-    )),
-    purchasesList: (json['purchasesList'] as List<dynamic>?)
-            ?.map((e) =>
-                PurchaseWrapper.fromJson(Map<String, dynamic>.from(e as Map)))
-            .toList() ??
-        [],
-  );
-}
+PurchasesResultWrapper _$PurchasesResultWrapperFromJson(Map json) =>
+    PurchasesResultWrapper(
+      responseCode: const BillingResponseConverter()
+          .fromJson(json['responseCode'] as int?),
+      billingResult:
+          BillingResultWrapper.fromJson((json['billingResult'] as Map?)?.map(
+        (k, e) => MapEntry(k as String, e),
+      )),
+      purchasesList: (json['purchasesList'] as List<dynamic>?)
+              ?.map((e) =>
+                  PurchaseWrapper.fromJson(Map<String, dynamic>.from(e as Map)))
+              .toList() ??
+          [],
+    );
 
 Map<String, dynamic> _$PurchasesResultWrapperToJson(
         PurchasesResultWrapper instance) =>
@@ -90,20 +86,19 @@ Map<String, dynamic> _$PurchasesResultWrapperToJson(
       'purchasesList': instance.purchasesList,
     };
 
-PurchasesHistoryResult _$PurchasesHistoryResultFromJson(Map json) {
-  return PurchasesHistoryResult(
-    billingResult:
-        BillingResultWrapper.fromJson((json['billingResult'] as Map?)?.map(
-      (k, e) => MapEntry(k as String, e),
-    )),
-    purchaseHistoryRecordList:
-        (json['purchaseHistoryRecordList'] as List<dynamic>?)
-                ?.map((e) => PurchaseHistoryRecordWrapper.fromJson(
-                    Map<String, dynamic>.from(e as Map)))
-                .toList() ??
-            [],
-  );
-}
+PurchasesHistoryResult _$PurchasesHistoryResultFromJson(Map json) =>
+    PurchasesHistoryResult(
+      billingResult:
+          BillingResultWrapper.fromJson((json['billingResult'] as Map?)?.map(
+        (k, e) => MapEntry(k as String, e),
+      )),
+      purchaseHistoryRecordList:
+          (json['purchaseHistoryRecordList'] as List<dynamic>?)
+                  ?.map((e) => PurchaseHistoryRecordWrapper.fromJson(
+                      Map<String, dynamic>.from(e as Map)))
+                  .toList() ??
+              [],
+    );
 
 Map<String, dynamic> _$PurchasesHistoryResultToJson(
         PurchasesHistoryResult instance) =>
diff --git a/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/sku_details_wrapper.g.dart b/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/sku_details_wrapper.g.dart
index d21f832a2de6..1fc450ed6933 100644
--- a/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/sku_details_wrapper.g.dart
+++ b/packages/in_app_purchase/in_app_purchase_android/lib/src/billing_client_wrappers/sku_details_wrapper.g.dart
@@ -6,27 +6,25 @@ part of 'sku_details_wrapper.dart';
 // JsonSerializableGenerator
 // **************************************************************************
 
-SkuDetailsWrapper _$SkuDetailsWrapperFromJson(Map json) {
-  return SkuDetailsWrapper(
-    description: json['description'] as String? ?? '',
-    freeTrialPeriod: json['freeTrialPeriod'] as String? ?? '',
-    introductoryPrice: json['introductoryPrice'] as String? ?? '',
-    introductoryPriceMicros:
-        json['introductoryPriceAmountMicros'] as String? ?? '',
-    introductoryPriceCycles: json['introductoryPriceCycles'] as int? ?? 0,
-    introductoryPricePeriod: json['introductoryPricePeriod'] as String? ?? '',
-    price: json['price'] as String? ?? '',
-    priceAmountMicros: json['priceAmountMicros'] as int? ?? 0,
-    priceCurrencyCode: json['priceCurrencyCode'] as String? ?? '',
-    priceCurrencySymbol: json['priceCurrencySymbol'] as String? ?? '',
-    sku: json['sku'] as String? ?? '',
-    subscriptionPeriod: json['subscriptionPeriod'] as String? ?? '',
-    title: json['title'] as String? ?? '',
-    type: const SkuTypeConverter().fromJson(json['type'] as String?),
-    originalPrice: json['originalPrice'] as String? ?? '',
-    originalPriceAmountMicros: json['originalPriceAmountMicros'] as int? ?? 0,
-  );
-}
+SkuDetailsWrapper _$SkuDetailsWrapperFromJson(Map json) => SkuDetailsWrapper(
+      description: json['description'] as String? ?? '',
+      freeTrialPeriod: json['freeTrialPeriod'] as String? ?? '',
+      introductoryPrice: json['introductoryPrice'] as String? ?? '',
+      introductoryPriceMicros:
+          json['introductoryPriceAmountMicros'] as String? ?? '',
+      introductoryPriceCycles: json['introductoryPriceCycles'] as int? ?? 0,
+      introductoryPricePeriod: json['introductoryPricePeriod'] as String? ?? '',
+      price: json['price'] as String? ?? '',
+      priceAmountMicros: json['priceAmountMicros'] as int? ?? 0,
+      priceCurrencyCode: json['priceCurrencyCode'] as String? ?? '',
+      priceCurrencySymbol: json['priceCurrencySymbol'] as String? ?? '',
+      sku: json['sku'] as String? ?? '',
+      subscriptionPeriod: json['subscriptionPeriod'] as String? ?? '',
+      title: json['title'] as String? ?? '',
+      type: const SkuTypeConverter().fromJson(json['type'] as String?),
+      originalPrice: json['originalPrice'] as String? ?? '',
+      originalPriceAmountMicros: json['originalPriceAmountMicros'] as int? ?? 0,
+    );
 
 Map<String, dynamic> _$SkuDetailsWrapperToJson(SkuDetailsWrapper instance) =>
     <String, dynamic>{
@@ -48,19 +46,18 @@ Map<String, dynamic> _$SkuDetailsWrapperToJson(SkuDetailsWrapper instance) =>
       'originalPriceAmountMicros': instance.originalPriceAmountMicros,
     };
 
-SkuDetailsResponseWrapper _$SkuDetailsResponseWrapperFromJson(Map json) {
-  return SkuDetailsResponseWrapper(
-    billingResult:
-        BillingResultWrapper.fromJson((json['billingResult'] as Map?)?.map(
-      (k, e) => MapEntry(k as String, e),
-    )),
-    skuDetailsList: (json['skuDetailsList'] as List<dynamic>?)
-            ?.map((e) =>
-                SkuDetailsWrapper.fromJson(Map<String, dynamic>.from(e as Map)))
-            .toList() ??
-        [],
-  );
-}
+SkuDetailsResponseWrapper _$SkuDetailsResponseWrapperFromJson(Map json) =>
+    SkuDetailsResponseWrapper(
+      billingResult:
+          BillingResultWrapper.fromJson((json['billingResult'] as Map?)?.map(
+        (k, e) => MapEntry(k as String, e),
+      )),
+      skuDetailsList: (json['skuDetailsList'] as List<dynamic>?)
+              ?.map((e) => SkuDetailsWrapper.fromJson(
+                  Map<String, dynamic>.from(e as Map)))
+              .toList() ??
+          [],
+    );
 
 Map<String, dynamic> _$SkuDetailsResponseWrapperToJson(
         SkuDetailsResponseWrapper instance) =>
@@ -69,13 +66,12 @@ Map<String, dynamic> _$SkuDetailsResponseWrapperToJson(
       'skuDetailsList': instance.skuDetailsList,
     };
 
-BillingResultWrapper _$BillingResultWrapperFromJson(Map json) {
-  return BillingResultWrapper(
-    responseCode:
-        const BillingResponseConverter().fromJson(json['responseCode'] as int?),
-    debugMessage: json['debugMessage'] as String?,
-  );
-}
+BillingResultWrapper _$BillingResultWrapperFromJson(Map json) =>
+    BillingResultWrapper(
+      responseCode: const BillingResponseConverter()
+          .fromJson(json['responseCode'] as int?),
+      debugMessage: json['debugMessage'] as String?,
+    );
 
 Map<String, dynamic> _$BillingResultWrapperToJson(
         BillingResultWrapper instance) =>
diff --git a/packages/in_app_purchase/in_app_purchase_android/pubspec.yaml b/packages/in_app_purchase/in_app_purchase_android/pubspec.yaml
index 64a40889f375..3a60abbae19d 100644
--- a/packages/in_app_purchase/in_app_purchase_android/pubspec.yaml
+++ b/packages/in_app_purchase/in_app_purchase_android/pubspec.yaml
@@ -25,8 +25,8 @@ dependencies:
   meta: ^1.3.0
 
 dev_dependencies:
-  build_runner: ^1.11.1
+  build_runner: ^2.0.0
   flutter_test:
     sdk: flutter
-  json_serializable: ^4.1.1
+  json_serializable: ^5.0.2
   test: ^1.16.0
diff --git a/packages/in_app_purchase/in_app_purchase_ios/CHANGELOG.md b/packages/in_app_purchase/in_app_purchase_ios/CHANGELOG.md
index 04509e56ecde..7e3902b206ab 100644
--- a/packages/in_app_purchase/in_app_purchase_ios/CHANGELOG.md
+++ b/packages/in_app_purchase/in_app_purchase_ios/CHANGELOG.md
@@ -1,3 +1,7 @@
+## NEXT
+
+* Update dev_dependency `build_runner` to ^2.0.0 and `json_serializable` to ^5.0.2.
+
 ## 0.1.3+4
 
 * Update minimum Flutter SDK to 2.5 and iOS deployment target to 9.0.
diff --git a/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/enum_converters.dart b/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/enum_converters.dart
index 08af2c6058c4..70178260febf 100644
--- a/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/enum_converters.dart
+++ b/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/enum_converters.dart
@@ -101,6 +101,7 @@ class SKProductDiscountPaymentModeConverter
 }
 
 // Define a class so we generate serializer helper methods for the enums
+// See https://github.com/google/json_serializable.dart/issues/778
 @JsonSerializable()
 class _SerializedEnums {
   late SKPaymentTransactionStateWrapper response;
diff --git a/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/enum_converters.g.dart b/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/enum_converters.g.dart
index b003f435a800..ce0f56ba4d34 100644
--- a/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/enum_converters.g.dart
+++ b/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/enum_converters.g.dart
@@ -6,16 +6,14 @@ part of 'enum_converters.dart';
 // JsonSerializableGenerator
 // **************************************************************************
 
-_SerializedEnums _$_SerializedEnumsFromJson(Map json) {
-  return _SerializedEnums()
-    ..response = _$enumDecode(
-        _$SKPaymentTransactionStateWrapperEnumMap, json['response'])
-    ..unit = _$enumDecode(_$SKSubscriptionPeriodUnitEnumMap, json['unit'])
-    ..discountPaymentMode = _$enumDecode(
-        _$SKProductDiscountPaymentModeEnumMap, json['discountPaymentMode']);
-}
+_SerializedEnums _$SerializedEnumsFromJson(Map json) => _SerializedEnums()
+  ..response =
+      _$enumDecode(_$SKPaymentTransactionStateWrapperEnumMap, json['response'])
+  ..unit = _$enumDecode(_$SKSubscriptionPeriodUnitEnumMap, json['unit'])
+  ..discountPaymentMode = _$enumDecode(
+      _$SKProductDiscountPaymentModeEnumMap, json['discountPaymentMode']);
 
-Map<String, dynamic> _$_SerializedEnumsToJson(_SerializedEnums instance) =>
+Map<String, dynamic> _$SerializedEnumsToJson(_SerializedEnums instance) =>
     <String, dynamic>{
       'response': _$SKPaymentTransactionStateWrapperEnumMap[instance.response],
       'unit': _$SKSubscriptionPeriodUnitEnumMap[instance.unit],
diff --git a/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/sk_payment_queue_wrapper.g.dart b/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/sk_payment_queue_wrapper.g.dart
index 2b886597adc5..4d2b5e4b3d4b 100644
--- a/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/sk_payment_queue_wrapper.g.dart
+++ b/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/sk_payment_queue_wrapper.g.dart
@@ -6,16 +6,14 @@ part of 'sk_payment_queue_wrapper.dart';
 // JsonSerializableGenerator
 // **************************************************************************
 
-SKError _$SKErrorFromJson(Map json) {
-  return SKError(
-    code: json['code'] as int? ?? 0,
-    domain: json['domain'] as String? ?? '',
-    userInfo: (json['userInfo'] as Map?)?.map(
-          (k, e) => MapEntry(k as String, e),
-        ) ??
-        {},
-  );
-}
+SKError _$SKErrorFromJson(Map json) => SKError(
+      code: json['code'] as int? ?? 0,
+      domain: json['domain'] as String? ?? '',
+      userInfo: (json['userInfo'] as Map?)?.map(
+            (k, e) => MapEntry(k as String, e),
+          ) ??
+          {},
+    );
 
 Map<String, dynamic> _$SKErrorToJson(SKError instance) => <String, dynamic>{
       'code': instance.code,
@@ -23,16 +21,14 @@ Map<String, dynamic> _$SKErrorToJson(SKError instance) => <String, dynamic>{
       'userInfo': instance.userInfo,
     };
 
-SKPaymentWrapper _$SKPaymentWrapperFromJson(Map json) {
-  return SKPaymentWrapper(
-    productIdentifier: json['productIdentifier'] as String? ?? '',
-    applicationUsername: json['applicationUsername'] as String?,
-    requestData: json['requestData'] as String?,
-    quantity: json['quantity'] as int? ?? 0,
-    simulatesAskToBuyInSandbox:
-        json['simulatesAskToBuyInSandbox'] as bool? ?? false,
-  );
-}
+SKPaymentWrapper _$SKPaymentWrapperFromJson(Map json) => SKPaymentWrapper(
+      productIdentifier: json['productIdentifier'] as String? ?? '',
+      applicationUsername: json['applicationUsername'] as String?,
+      requestData: json['requestData'] as String?,
+      quantity: json['quantity'] as int? ?? 0,
+      simulatesAskToBuyInSandbox:
+          json['simulatesAskToBuyInSandbox'] as bool? ?? false,
+    );
 
 Map<String, dynamic> _$SKPaymentWrapperToJson(SKPaymentWrapper instance) =>
     <String, dynamic>{
diff --git a/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/sk_payment_transaction_wrappers.g.dart b/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/sk_payment_transaction_wrappers.g.dart
index 4c7af21bc151..fd10d9ad977b 100644
--- a/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/sk_payment_transaction_wrappers.g.dart
+++ b/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/sk_payment_transaction_wrappers.g.dart
@@ -6,23 +6,22 @@ part of 'sk_payment_transaction_wrappers.dart';
 // JsonSerializableGenerator
 // **************************************************************************
 
-SKPaymentTransactionWrapper _$SKPaymentTransactionWrapperFromJson(Map json) {
-  return SKPaymentTransactionWrapper(
-    payment: SKPaymentWrapper.fromJson(
-        Map<String, dynamic>.from(json['payment'] as Map)),
-    transactionState: const SKTransactionStatusConverter()
-        .fromJson(json['transactionState'] as int?),
-    originalTransaction: json['originalTransaction'] == null
-        ? null
-        : SKPaymentTransactionWrapper.fromJson(
-            Map<String, dynamic>.from(json['originalTransaction'] as Map)),
-    transactionTimeStamp: (json['transactionTimeStamp'] as num?)?.toDouble(),
-    transactionIdentifier: json['transactionIdentifier'] as String?,
-    error: json['error'] == null
-        ? null
-        : SKError.fromJson(Map<String, dynamic>.from(json['error'] as Map)),
-  );
-}
+SKPaymentTransactionWrapper _$SKPaymentTransactionWrapperFromJson(Map json) =>
+    SKPaymentTransactionWrapper(
+      payment: SKPaymentWrapper.fromJson(
+          Map<String, dynamic>.from(json['payment'] as Map)),
+      transactionState: const SKTransactionStatusConverter()
+          .fromJson(json['transactionState'] as int?),
+      originalTransaction: json['originalTransaction'] == null
+          ? null
+          : SKPaymentTransactionWrapper.fromJson(
+              Map<String, dynamic>.from(json['originalTransaction'] as Map)),
+      transactionTimeStamp: (json['transactionTimeStamp'] as num?)?.toDouble(),
+      transactionIdentifier: json['transactionIdentifier'] as String?,
+      error: json['error'] == null
+          ? null
+          : SKError.fromJson(Map<String, dynamic>.from(json['error'] as Map)),
+    );
 
 Map<String, dynamic> _$SKPaymentTransactionWrapperToJson(
         SKPaymentTransactionWrapper instance) =>
diff --git a/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/sk_product_wrapper.g.dart b/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/sk_product_wrapper.g.dart
index 66f4b7827c38..485bf1932efa 100644
--- a/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/sk_product_wrapper.g.dart
+++ b/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/sk_product_wrapper.g.dart
@@ -6,20 +6,19 @@ part of 'sk_product_wrapper.dart';
 // JsonSerializableGenerator
 // **************************************************************************
 
-SkProductResponseWrapper _$SkProductResponseWrapperFromJson(Map json) {
-  return SkProductResponseWrapper(
-    products: (json['products'] as List<dynamic>?)
-            ?.map((e) =>
-                SKProductWrapper.fromJson(Map<String, dynamic>.from(e as Map)))
-            .toList() ??
-        [],
-    invalidProductIdentifiers:
-        (json['invalidProductIdentifiers'] as List<dynamic>?)
-                ?.map((e) => e as String)
-                .toList() ??
-            [],
-  );
-}
+SkProductResponseWrapper _$SkProductResponseWrapperFromJson(Map json) =>
+    SkProductResponseWrapper(
+      products: (json['products'] as List<dynamic>?)
+              ?.map((e) => SKProductWrapper.fromJson(
+                  Map<String, dynamic>.from(e as Map)))
+              .toList() ??
+          [],
+      invalidProductIdentifiers:
+          (json['invalidProductIdentifiers'] as List<dynamic>?)
+                  ?.map((e) => e as String)
+                  .toList() ??
+              [],
+    );
 
 Map<String, dynamic> _$SkProductResponseWrapperToJson(
         SkProductResponseWrapper instance) =>
@@ -29,13 +28,12 @@ Map<String, dynamic> _$SkProductResponseWrapperToJson(
     };
 
 SKProductSubscriptionPeriodWrapper _$SKProductSubscriptionPeriodWrapperFromJson(
-    Map json) {
-  return SKProductSubscriptionPeriodWrapper(
-    numberOfUnits: json['numberOfUnits'] as int? ?? 0,
-    unit: const SKSubscriptionPeriodUnitConverter()
-        .fromJson(json['unit'] as int?),
-  );
-}
+        Map json) =>
+    SKProductSubscriptionPeriodWrapper(
+      numberOfUnits: json['numberOfUnits'] as int? ?? 0,
+      unit: const SKSubscriptionPeriodUnitConverter()
+          .fromJson(json['unit'] as int?),
+    );
 
 Map<String, dynamic> _$SKProductSubscriptionPeriodWrapperToJson(
         SKProductSubscriptionPeriodWrapper instance) =>
@@ -44,22 +42,21 @@ Map<String, dynamic> _$SKProductSubscriptionPeriodWrapperToJson(
       'unit': const SKSubscriptionPeriodUnitConverter().toJson(instance.unit),
     };
 
-SKProductDiscountWrapper _$SKProductDiscountWrapperFromJson(Map json) {
-  return SKProductDiscountWrapper(
-    price: json['price'] as String? ?? '',
-    priceLocale:
-        SKPriceLocaleWrapper.fromJson((json['priceLocale'] as Map?)?.map(
-      (k, e) => MapEntry(k as String, e),
-    )),
-    numberOfPeriods: json['numberOfPeriods'] as int? ?? 0,
-    paymentMode: const SKProductDiscountPaymentModeConverter()
-        .fromJson(json['paymentMode'] as int?),
-    subscriptionPeriod: SKProductSubscriptionPeriodWrapper.fromJson(
-        (json['subscriptionPeriod'] as Map?)?.map(
-      (k, e) => MapEntry(k as String, e),
-    )),
-  );
-}
+SKProductDiscountWrapper _$SKProductDiscountWrapperFromJson(Map json) =>
+    SKProductDiscountWrapper(
+      price: json['price'] as String? ?? '',
+      priceLocale:
+          SKPriceLocaleWrapper.fromJson((json['priceLocale'] as Map?)?.map(
+        (k, e) => MapEntry(k as String, e),
+      )),
+      numberOfPeriods: json['numberOfPeriods'] as int? ?? 0,
+      paymentMode: const SKProductDiscountPaymentModeConverter()
+          .fromJson(json['paymentMode'] as int?),
+      subscriptionPeriod: SKProductSubscriptionPeriodWrapper.fromJson(
+          (json['subscriptionPeriod'] as Map?)?.map(
+        (k, e) => MapEntry(k as String, e),
+      )),
+    );
 
 Map<String, dynamic> _$SKProductDiscountWrapperToJson(
         SKProductDiscountWrapper instance) =>
@@ -72,29 +69,28 @@ Map<String, dynamic> _$SKProductDiscountWrapperToJson(
       'subscriptionPeriod': instance.subscriptionPeriod,
     };
 
-SKProductWrapper _$SKProductWrapperFromJson(Map json) {
-  return SKProductWrapper(
-    productIdentifier: json['productIdentifier'] as String? ?? '',
-    localizedTitle: json['localizedTitle'] as String? ?? '',
-    localizedDescription: json['localizedDescription'] as String? ?? '',
-    priceLocale:
-        SKPriceLocaleWrapper.fromJson((json['priceLocale'] as Map?)?.map(
-      (k, e) => MapEntry(k as String, e),
-    )),
-    subscriptionGroupIdentifier: json['subscriptionGroupIdentifier'] as String?,
-    price: json['price'] as String? ?? '',
-    subscriptionPeriod: json['subscriptionPeriod'] == null
-        ? null
-        : SKProductSubscriptionPeriodWrapper.fromJson(
-            (json['subscriptionPeriod'] as Map?)?.map(
-            (k, e) => MapEntry(k as String, e),
-          )),
-    introductoryPrice: json['introductoryPrice'] == null
-        ? null
-        : SKProductDiscountWrapper.fromJson(
-            Map<String, dynamic>.from(json['introductoryPrice'] as Map)),
-  );
-}
+SKProductWrapper _$SKProductWrapperFromJson(Map json) => SKProductWrapper(
+      productIdentifier: json['productIdentifier'] as String? ?? '',
+      localizedTitle: json['localizedTitle'] as String? ?? '',
+      localizedDescription: json['localizedDescription'] as String? ?? '',
+      priceLocale:
+          SKPriceLocaleWrapper.fromJson((json['priceLocale'] as Map?)?.map(
+        (k, e) => MapEntry(k as String, e),
+      )),
+      subscriptionGroupIdentifier:
+          json['subscriptionGroupIdentifier'] as String?,
+      price: json['price'] as String? ?? '',
+      subscriptionPeriod: json['subscriptionPeriod'] == null
+          ? null
+          : SKProductSubscriptionPeriodWrapper.fromJson(
+              (json['subscriptionPeriod'] as Map?)?.map(
+              (k, e) => MapEntry(k as String, e),
+            )),
+      introductoryPrice: json['introductoryPrice'] == null
+          ? null
+          : SKProductDiscountWrapper.fromJson(
+              Map<String, dynamic>.from(json['introductoryPrice'] as Map)),
+    );
 
 Map<String, dynamic> _$SKProductWrapperToJson(SKProductWrapper instance) =>
     <String, dynamic>{
@@ -108,13 +104,12 @@ Map<String, dynamic> _$SKProductWrapperToJson(SKProductWrapper instance) =>
       'introductoryPrice': instance.introductoryPrice,
     };
 
-SKPriceLocaleWrapper _$SKPriceLocaleWrapperFromJson(Map json) {
-  return SKPriceLocaleWrapper(
-    currencySymbol: json['currencySymbol'] as String? ?? '',
-    currencyCode: json['currencyCode'] as String? ?? '',
-    countryCode: json['countryCode'] as String? ?? '',
-  );
-}
+SKPriceLocaleWrapper _$SKPriceLocaleWrapperFromJson(Map json) =>
+    SKPriceLocaleWrapper(
+      currencySymbol: json['currencySymbol'] as String? ?? '',
+      currencyCode: json['currencyCode'] as String? ?? '',
+      countryCode: json['countryCode'] as String? ?? '',
+    );
 
 Map<String, dynamic> _$SKPriceLocaleWrapperToJson(
         SKPriceLocaleWrapper instance) =>
diff --git a/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/sk_storefront_wrapper.g.dart b/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/sk_storefront_wrapper.g.dart
index f75cfc5711e8..b2d5d3a06d1d 100644
--- a/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/sk_storefront_wrapper.g.dart
+++ b/packages/in_app_purchase/in_app_purchase_ios/lib/src/store_kit_wrappers/sk_storefront_wrapper.g.dart
@@ -6,12 +6,11 @@ part of 'sk_storefront_wrapper.dart';
 // JsonSerializableGenerator
 // **************************************************************************
 
-SKStorefrontWrapper _$SKStorefrontWrapperFromJson(Map json) {
-  return SKStorefrontWrapper(
-    countryCode: json['countryCode'] as String,
-    identifier: json['identifier'] as String,
-  );
-}
+SKStorefrontWrapper _$SKStorefrontWrapperFromJson(Map json) =>
+    SKStorefrontWrapper(
+      countryCode: json['countryCode'] as String,
+      identifier: json['identifier'] as String,
+    );
 
 Map<String, dynamic> _$SKStorefrontWrapperToJson(
         SKStorefrontWrapper instance) =>
diff --git a/packages/in_app_purchase/in_app_purchase_ios/pubspec.yaml b/packages/in_app_purchase/in_app_purchase_ios/pubspec.yaml
index 9ba642e2e590..30a57bb56c94 100644
--- a/packages/in_app_purchase/in_app_purchase_ios/pubspec.yaml
+++ b/packages/in_app_purchase/in_app_purchase_ios/pubspec.yaml
@@ -24,8 +24,8 @@ dependencies:
   meta: ^1.3.0
 
 dev_dependencies:
-  build_runner: ^1.11.1
+  build_runner: ^2.0.0
   flutter_test:
     sdk: flutter
-  json_serializable: ^4.1.1
+  json_serializable: ^5.0.2
   test: ^1.16.0