diff --git a/lib/nyxx.dart b/lib/nyxx.dart
index 8c53a39ec..4119dc7f8 100644
--- a/lib/nyxx.dart
+++ b/lib/nyxx.dart
@@ -68,7 +68,7 @@ export 'src/builders/application_command.dart'
     show ApplicationCommandBuilder, ApplicationCommandUpdateBuilder, CommandOptionBuilder, CommandOptionChoiceBuilder;
 export 'src/builders/interaction_response.dart' show InteractionResponseBuilder, ModalBuilder, InteractionCallbackType;
 export 'src/builders/entitlement.dart' show TestEntitlementBuilder, TestEntitlementType;
-export 'src/builders/application.dart' show ApplicationUpdateBuilder;
+export 'src/builders/application.dart' show ApplicationUpdateBuilder, ApplicationIntegrationTypeConfigurationBuilder;
 
 export 'src/cache/cache.dart' show Cache, CacheConfig;
 
diff --git a/lib/src/builders/application.dart b/lib/src/builders/application.dart
index ff9efd058..268046f96 100644
--- a/lib/src/builders/application.dart
+++ b/lib/src/builders/application.dart
@@ -4,6 +4,22 @@ import 'package:nyxx/src/builders/sentinels.dart';
 import 'package:nyxx/src/models/application.dart';
 import 'package:nyxx/src/utils/flags.dart';
 
+class ApplicationIntegrationTypeConfigurationBuilder extends CreateBuilder<ApplicationIntegrationTypeConfiguration> {
+  /// Install params for each installation context's default in-app authorization link.
+  final InstallationParameters? oauth2InstallParameters;
+
+  ApplicationIntegrationTypeConfigurationBuilder({this.oauth2InstallParameters});
+
+  @override
+  Map<String, Object?> build() => {
+        if (oauth2InstallParameters != null)
+          'oauth2_install_params': {
+            'scopes': oauth2InstallParameters!.scopes,
+            'permissions': oauth2InstallParameters!.permissions.value.toString(),
+          },
+      };
+}
+
 class ApplicationUpdateBuilder extends UpdateBuilder<Application> {
   Uri? customInstallUrl;
 
@@ -23,7 +39,7 @@ class ApplicationUpdateBuilder extends UpdateBuilder<Application> {
 
   List<String>? tags;
 
-  Map<ApplicationIntegrationType, ApplicationIntegrationTypeConfiguration>? integrationTypesConfig;
+  Map<ApplicationIntegrationType, ApplicationIntegrationTypeConfigurationBuilder>? integrationTypesConfig;
 
   ApplicationUpdateBuilder({
     this.customInstallUrl,
@@ -49,13 +65,9 @@ class ApplicationUpdateBuilder extends UpdateBuilder<Application> {
             'permissions': installationParameters!.permissions.value.toString(),
           },
         if (integrationTypesConfig != null)
-          'integration_types_config': integrationTypesConfig!.map((key, value) => MapEntry(key.value.toString(), {
-                if (value.oauth2InstallParameters != null)
-                  'oauth2_install_params': {
-                    'scopes': value.oauth2InstallParameters!.scopes,
-                    'permissions': value.oauth2InstallParameters!.permissions.value.toString(),
-                  },
-              })),
+          'integration_types_config': {
+            for (final MapEntry(:key, :value) in integrationTypesConfig!.entries) key.value.toString(): value.build(),
+          },
         if (flags != null) 'flags': flags!.value,
         if (!identical(icon, sentinelImageBuilder)) 'icon': icon?.buildDataString(),
         if (!identical(coverImage, sentinelImageBuilder)) 'cover_image': coverImage?.buildDataString(),
diff --git a/lib/src/http/managers/application_command_manager.dart b/lib/src/http/managers/application_command_manager.dart
index e57a3d53c..c334a30f5 100644
--- a/lib/src/http/managers/application_command_manager.dart
+++ b/lib/src/http/managers/application_command_manager.dart
@@ -59,8 +59,8 @@ abstract class ApplicationCommandManager extends Manager<ApplicationCommand> {
       defaultMemberPermissions: maybeParse(raw['default_member_permissions'], (String raw) => Permissions(int.parse(raw))),
       hasDmPermission: raw['dm_permission'] as bool?,
       isNsfw: raw['nsfw'] as bool?,
-      integrationTypes: (raw['integration_types'] as List).cast<int>().map(ApplicationIntegrationType.parse).toList(),
-      contexts: (raw['contexts'] as List? ?? []).cast<int>().map(InteractionContextType.parse).toList(),
+      integrationTypes: parseMany(raw['integration_types']! as List, ApplicationIntegrationType.parse),
+      contexts: maybeParseMany(raw['contexts'], InteractionContextType.parse),
       version: Snowflake.parse(raw['version']!),
     );
   }
diff --git a/lib/src/http/managers/application_manager.dart b/lib/src/http/managers/application_manager.dart
index b687f0558..f2e373178 100644
--- a/lib/src/http/managers/application_manager.dart
+++ b/lib/src/http/managers/application_manager.dart
@@ -62,9 +62,12 @@ class ApplicationManager {
       installationParameters: maybeParse(raw['install_params'], parseInstallationParameters),
       customInstallUrl: maybeParse(raw['custom_install_url'], Uri.parse),
       integrationTypesConfig: maybeParse(
-          raw['integration_types_config'],
-          (config) => (config as Map).cast<String, Object?>().map((key, value) =>
-              MapEntry(ApplicationIntegrationType.parse(int.parse(key)), parseApplicationIntegrationTypeConfiguration((value as Map).cast<String, Object>())))),
+        raw['integration_types_config'],
+        (Map<String, Object?> config) => {
+          for (final MapEntry(:key, :value) in config.entries)
+            ApplicationIntegrationType.parse(int.parse(key)): parseApplicationIntegrationTypeConfiguration(value as Map<String, Object?>)
+        },
+      ),
       roleConnectionsVerificationUrl: maybeParse(raw['role_connections_verification_url'], Uri.parse),
     );
   }
diff --git a/lib/src/http/managers/interaction_manager.dart b/lib/src/http/managers/interaction_manager.dart
index c8a424a28..a1d3266fd 100644
--- a/lib/src/http/managers/interaction_manager.dart
+++ b/lib/src/http/managers/interaction_manager.dart
@@ -55,10 +55,11 @@ class InteractionManager {
     final entitlements = parseMany(raw['entitlements'] as List, client.applications[applicationId].entitlements.parse);
 
     final authorizingIntegrationOwners = maybeParse(
-            raw['authorizing_integration_owners'],
-            (map) =>
-                (map as Map).cast<String, Object>().map((key, value) => MapEntry(ApplicationIntegrationType.parse(int.parse(key)), Snowflake.parse(value)))) ??
-        {};
+      raw['authorizing_integration_owners'],
+      (Map<String, Object?> map) => {
+        for (final MapEntry(:key, :value) in map.entries) ApplicationIntegrationType.parse(int.parse(key)): Snowflake.parse(value!),
+      },
+    );
     final context = maybeParse(raw['context'], InteractionContextType.parse);
 
     return switch (type) {
diff --git a/lib/src/http/managers/message_manager.dart b/lib/src/http/managers/message_manager.dart
index 5a370ea8e..6aa8af936 100644
--- a/lib/src/http/managers/message_manager.dart
+++ b/lib/src/http/managers/message_manager.dart
@@ -83,7 +83,7 @@ class MessageManager extends Manager<Message> {
       ),
       interactionMetadata: maybeParse(
         raw['interaction_metadata'],
-        (Map<dynamic, dynamic> raw) => parseMessageInteractionMetadata(raw.cast()),
+        parseMessageInteractionMetadata,
       ),
       thread: maybeParse(raw['thread'], client.channels.parse) as Thread?,
       components: maybeParseMany(raw['components'], parseMessageComponent),
@@ -325,9 +325,10 @@ class MessageManager extends Manager<Message> {
       id: Snowflake.parse(raw['id']!),
       type: InteractionType.parse(raw['type'] as int),
       userId: Snowflake.parse(raw['user_id']!),
-      authorizingIntegrationOwners: (raw['authorizing_integration_owners'] as Map)
-          .cast<String, Object>()
-          .map((key, value) => MapEntry(ApplicationIntegrationType.parse(int.parse(key)), Snowflake.parse(value))),
+      authorizingIntegrationOwners: {
+        for (final MapEntry(:key, :value) in (raw['authorizing_integration_owners'] as Map<String, Object?>).entries)
+          ApplicationIntegrationType.parse(int.parse(key)): Snowflake.parse(value!),
+      },
       originalResponseMessageId: maybeParse(raw['original_response_message_id'], Snowflake.parse),
       interactedMessageId: maybeParse(raw['interacted_message_id'], Snowflake.parse),
       triggeringInteractionMetadata: maybeParse(raw['triggering_interaction_metadata'], parseMessageInteractionMetadata),
diff --git a/lib/src/models/commands/application_command.dart b/lib/src/models/commands/application_command.dart
index f31208edc..3dd49b312 100644
--- a/lib/src/models/commands/application_command.dart
+++ b/lib/src/models/commands/application_command.dart
@@ -66,7 +66,7 @@ class ApplicationCommand extends PartialApplicationCommand {
   final List<ApplicationIntegrationType> integrationTypes;
 
   /// Interaction context(s) where the command can be used, only for globally-scoped commands. By default, all interaction context types included for new commands.
-  final List<InteractionContextType> contexts;
+  final List<InteractionContextType>? contexts;
 
   /// An auto-incrementing version number.
   final Snowflake version;
diff --git a/lib/src/models/interaction.dart b/lib/src/models/interaction.dart
index a67483abb..e5ed84589 100644
--- a/lib/src/models/interaction.dart
+++ b/lib/src/models/interaction.dart
@@ -109,7 +109,7 @@ abstract class Interaction<T> with ToStringHelper {
   final List<Entitlement> entitlements;
 
   /// Mapping of installation contexts that the interaction was authorized for to related user or guild IDs.
-  final Map<ApplicationIntegrationType, Snowflake> authorizingIntegrationOwners;
+  final Map<ApplicationIntegrationType, Snowflake>? authorizingIntegrationOwners;
 
   /// Context where the interaction was triggered from.
   final InteractionContextType? context;