diff --git a/.vscode/launch.json b/.vscode/launch.json
index 7241e21ad..78ab09776 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -28,6 +28,6 @@
                 "--config",
                 "${workspaceFolder}/example/pubspec.yaml"
             ]
-        },
+        }
     ]
-}
\ No newline at end of file
+}
diff --git a/example/ios/Flutter/AppFrameworkInfo.plist b/example/ios/Flutter/AppFrameworkInfo.plist
index f2872cf47..4f8d4d245 100644
--- a/example/ios/Flutter/AppFrameworkInfo.plist
+++ b/example/ios/Flutter/AppFrameworkInfo.plist
@@ -21,6 +21,6 @@
   <key>CFBundleVersion</key>
   <string>1.0</string>
   <key>MinimumOSVersion</key>
-  <string>9.0</string>
+  <string>11.0</string>
 </dict>
 </plist>
diff --git a/example/ios/Podfile.lock b/example/ios/Podfile.lock
index 6a6fccb16..ed76dcbd8 100644
--- a/example/ios/Podfile.lock
+++ b/example/ios/Podfile.lock
@@ -202,11 +202,11 @@ PODS:
     - GoogleUtilities/Network (~> 7.7)
     - "GoogleUtilities/NSData+zlib (~> 7.7)"
     - nanopb (~> 2.30908.0)
-  - GoogleDataTransport (9.1.4):
+  - GoogleDataTransport (9.2.0):
     - GoogleUtilities/Environment (~> 7.7)
     - nanopb (< 2.30910.0, >= 2.30908.0)
     - PromisesObjC (< 3.0, >= 1.2)
-  - GoogleSignIn (6.2.1):
+  - GoogleSignIn (6.2.3):
     - AppAuth (~> 1.5)
     - GTMAppAuth (~> 1.3)
     - GTMSessionFetcher/Core (~> 1.1)
@@ -244,15 +244,15 @@ PODS:
     - Flutter
   - is_firebase_test_lab_activated (0.0.1):
     - Flutter
-  - libwebp (1.2.1):
-    - libwebp/demux (= 1.2.1)
-    - libwebp/mux (= 1.2.1)
-    - libwebp/webp (= 1.2.1)
-  - libwebp/demux (1.2.1):
+  - libwebp (1.2.3):
+    - libwebp/demux (= 1.2.3)
+    - libwebp/mux (= 1.2.3)
+    - libwebp/webp (= 1.2.3)
+  - libwebp/demux (1.2.3):
     - libwebp/webp
-  - libwebp/mux (1.2.1):
+  - libwebp/mux (1.2.3):
     - libwebp/demux
-  - libwebp/webp (1.2.1)
+  - libwebp/webp (1.2.3)
   - local_auth_ios (0.0.1):
     - Flutter
   - Mantle (2.2.0):
@@ -272,14 +272,14 @@ PODS:
     - Flutter
   - permission_handler_apple (9.0.4):
     - Flutter
-  - PromisesObjC (2.1.0)
+  - PromisesObjC (2.1.1)
   - ReachabilitySwift (5.0.0)
-  - SDWebImage (5.12.5):
-    - SDWebImage/Core (= 5.12.5)
-  - SDWebImage/Core (5.12.5)
-  - SDWebImageWebPCoder (0.8.4):
+  - SDWebImage (5.13.2):
+    - SDWebImage/Core (= 5.13.2)
+  - SDWebImage/Core (5.13.2)
+  - SDWebImageWebPCoder (0.9.1):
     - libwebp (~> 1.0)
-    - SDWebImage/Core (~> 5.10)
+    - SDWebImage/Core (~> 5.13)
   - Sentry (7.11.0):
     - Sentry/Core (= 7.11.0)
   - Sentry/Core (7.11.0)
@@ -518,7 +518,7 @@ SPEC CHECKSUMS:
   FirebaseMessaging: 5ebc42d281567658a2cb72b9ef3506e4a1a1a6e4
   FirebasePerformance: ecaa182ba9c6654e2e3813e759036d80e22269a8
   FirebaseRemoteConfig: a5d9188d8f57f602636f111eca6460ebe32b9b71
-  Flutter: 50d75fe2f02b26cc09d224853bb45737f8b3214a
+  Flutter: f04841e97a9d0b0a8025694d0796dd46242b2854
   flutter_facebook_auth: a030aef1c2552fdc7cb090acc716ac836e3bb63c
   flutter_image_compress: fd2b476345226e1a10ea352fa306af95704642c1
   flutter_inappwebview: bfd58618f49dc62f2676de690fc6dcda1d6c3721
@@ -527,10 +527,10 @@ SPEC CHECKSUMS:
   FMDB: 2ce00b547f966261cd18927a3ddb07cb6f3db82a
   geocoding: 32cfcdb16d38d907caaba65e2e42ad10d38bee58
   geolocator_apple: cc556e6844d508c95df1e87e3ea6fa4e58c50401
-  google_sign_in_ios: 90eec6616c4c2105b9f9fe5c774773d13565b504
+  google_sign_in_ios: 4f85eb9f937450765c8573bb85fd8cd6a5af675c
   GoogleAppMeasurement: 71156240babd3cc6ced03e0d54816f01a880c730
-  GoogleDataTransport: 5fffe35792f8b96ec8d6775f5eccd83c998d5a3b
-  GoogleSignIn: 9c69f4188921d8f789816e4c99ba2a1f5f868ddc
+  GoogleDataTransport: 1c8145da7117bd68bbbed00cf304edb6a24de00f
+  GoogleSignIn: f4d3939cc0d9264d7509c4b9a924a6c987e30b54
   GoogleUtilities: e0913149f6b0625b553d70dae12b49fc62914fd1
   GTMAppAuth: 4d8f864896f3646f0c33baf38a28362f4c601e15
   GTMSessionFetcher: 5595ec75acf5be50814f81e9189490412bad82ba
@@ -539,7 +539,7 @@ SPEC CHECKSUMS:
   in_app_review: 4a97249f7a2f539a0f294c2d9196b7fe35e49541
   integration_test: a1e7d09bd98eca2fc37aefd79d4f41ad37bdbbe5
   is_firebase_test_lab_activated: 84effe92e5d79a58455a2861b5e1ba688016cf57
-  libwebp: 98a37e597e40bfdb4c911fc98f2c53d0b12d05fc
+  libwebp: 60305b2e989864154bd9be3d772730f08fc6a59c
   local_auth_ios: 0d333dde7780f669e66f19d2ff6005f3ea84008d
   Mantle: c5aa8794a29a022dfbbfc9799af95f477a69b62d
   nanopb: a0ba3315591a9ae0a16a309ee504766e90db0c96
@@ -548,10 +548,10 @@ SPEC CHECKSUMS:
   package_info_plus: 6c92f08e1f853dc01228d6f553146438dafcd14e
   path_provider_ios: 14f3d2fd28c4fdb42f44e0f751d12861c43cee02
   permission_handler_apple: 44366e37eaf29454a1e7b1b7d736c2cceaeb17ce
-  PromisesObjC: 99b6f43f9e1044bd87a95a60beff28c2c44ddb72
+  PromisesObjC: ab77feca74fa2823e7af4249b8326368e61014cb
   ReachabilitySwift: 985039c6f7b23a1da463388634119492ff86c825
-  SDWebImage: 0905f1b7760fc8ac4198cae0036600d67478751e
-  SDWebImageWebPCoder: f93010f3f6c031e2f8fb3081ca4ee6966c539815
+  SDWebImage: 72f86271a6f3139cc7e4a89220946489d4b9a866
+  SDWebImageWebPCoder: 18503de6621dd2c420d680e33d46bf8e1d5169b0
   Sentry: 0c5cd63d714187b4a39c331c1f0eb04ba7868341
   sentry_flutter: efb3df2c203cd03aad255892a8d628a458656d14
   share_plus: 056a1e8ac890df3e33cb503afffaf1e9b4fbae68
@@ -568,4 +568,4 @@ SPEC CHECKSUMS:
 
 PODFILE CHECKSUM: cc1f88378b4bfcf93a6ce00d2c587857c6008d3b
 
-COCOAPODS: 1.11.2
+COCOAPODS: 1.11.3
diff --git a/example/ios/Runner.xcodeproj/project.pbxproj b/example/ios/Runner.xcodeproj/project.pbxproj
index a1a053208..8a7d67dc3 100644
--- a/example/ios/Runner.xcodeproj/project.pbxproj
+++ b/example/ios/Runner.xcodeproj/project.pbxproj
@@ -340,7 +340,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SUPPORTED_PLATFORMS = iphoneos;
@@ -425,7 +425,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
@@ -474,7 +474,7 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SUPPORTED_PLATFORMS = iphoneos;
diff --git a/example/lib/gen/assets.gen.dart b/example/lib/gen/assets.gen.dart
index 2cacdc5cc..7d9b07c50 100644
--- a/example/lib/gen/assets.gen.dart
+++ b/example/lib/gen/assets.gen.dart
@@ -105,8 +105,8 @@ class $AssetsImagesIconsGen {
   SvgGenImage get paint => const SvgGenImage('assets/images/icons/paint.svg');
 }
 
-class Assets {
-  Assets._();
+class MyAssets {
+  MyAssets._();
 
   static const $AssetsFlareGen flare = $AssetsFlareGen();
   static const $AssetsImagesGen images = $AssetsImagesGen();
diff --git a/example/lib/gen/colors.gen.dart b/example/lib/gen/colors.gen.dart
index 530b11c80..8d4e97563 100644
--- a/example/lib/gen/colors.gen.dart
+++ b/example/lib/gen/colors.gen.dart
@@ -10,8 +10,8 @@
 import 'package:flutter/painting.dart';
 import 'package:flutter/material.dart';
 
-class ColorName {
-  ColorName._();
+class MyColorName {
+  MyColorName._();
 
   /// Color: #000000
   static const Color black = Color(0xFF000000);
diff --git a/example/lib/gen/fonts.gen.dart b/example/lib/gen/fonts.gen.dart
index 9c088f07a..e7fd21913 100644
--- a/example/lib/gen/fonts.gen.dart
+++ b/example/lib/gen/fonts.gen.dart
@@ -7,8 +7,8 @@
 // ignore_for_file: type=lint
 // ignore_for_file: directives_ordering,unnecessary_import
 
-class FontFamily {
-  FontFamily._();
+class MyFontFamily {
+  MyFontFamily._();
 
   /// Font family: Raleway
   static const String raleway = 'Raleway';
diff --git a/example/lib/main.dart b/example/lib/main.dart
index 327cf4c7c..c9fe64ee6 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -1,24 +1,22 @@
-import 'package:firebase_core/firebase_core.dart';
-import 'package:flutter/material.dart';
 import 'package:example_resources/gen/assets.gen.dart' as res;
+import 'package:flutter/material.dart';
 
-import 'firebase_options.dart';
 import 'gen/assets.gen.dart';
 import 'gen/colors.gen.dart';
 import 'gen/fonts.gen.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
-  await Firebase.initializeApp(
-    options: DefaultFirebaseOptions.currentPlatform,
-  );
+  // await Firebase.initializeApp(
+  //   options: DefaultFirebaseOptions.currentPlatform,
+  // );
 
   runApp(MaterialApp(
     title: 'Flutter Demo',
     theme: ThemeData(
       // Auto generated font from FlutterGen.
-      fontFamily: FontFamily.raleway,
-      primarySwatch: ColorName.crimsonRed,
+      fontFamily: MyFontFamily.raleway,
+      primarySwatch: MyColorName.crimsonRed,
     ),
     home: Scaffold(
       appBar: AppBar(
@@ -33,7 +31,7 @@ void main() async {
               SizedBox(
                 width: 200,
                 height: 200,
-                child: Assets.flare.penguin.flare(
+                child: MyAssets.flare.penguin.flare(
                   animation: 'walk',
                   fit: BoxFit.contain,
                 ),
@@ -41,21 +39,21 @@ void main() async {
               SizedBox(
                 width: 200,
                 height: 200,
-                child: Assets.rive.vehicles.rive(
+                child: MyAssets.rive.vehicles.rive(
                   fit: BoxFit.contain,
                 ),
               ),
-              Assets.images.chip1.image(),
+              MyAssets.images.chip1.image(),
               // Use from example_resource package.
               res.Assets.images.flutter3.image(),
               res.Assets.images.dart.svg(),
-              Assets.images.icons.kmm.svg(key: const Key("kmm_svg")),
-              Assets.images.icons.fuchsia.svg(),
-              Assets.images.icons.paint.svg(
+              MyAssets.images.icons.kmm.svg(key: const Key("kmm_svg")),
+              MyAssets.images.icons.fuchsia.svg(),
+              MyAssets.images.icons.paint.svg(
                 width: 120,
                 height: 120,
               ),
-              // Assets.pictures.chip5.image(
+              // MyAssets.pictures.chip5.image(
               //   key: const Key("chip5"),
               //   width: 120,
               //   height: 120,
@@ -65,11 +63,11 @@ void main() async {
                 'Hi there, I\'m FlutterGen',
                 style: TextStyle(
                   // Auto generated color from FlutterGen.
-                  color: ColorName.black60,
+                  color: MyColorName.black60,
 
                   // Auto generated font from FlutterGen.
-                  fontFamily: FontFamily.robotoMono,
-                  fontFamilyFallback: [FontFamily.raleway],
+                  fontFamily: MyFontFamily.robotoMono,
+                  fontFamilyFallback: [MyFontFamily.raleway],
                 ),
               ),
             ],
diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index 95dfce1dc..301034f69 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -41,7 +41,7 @@ dependencies:
   local_auth: 2.0.1
   flutter_hooks: 0.18.3
   hooks_riverpod: 1.0.3
-  async: 2.8.2
+  # async: 2.9.0
   dio: 4.0.6
   connectivity_plus: 2.3.0
   ua_client_hints: 1.1.0
@@ -131,16 +131,24 @@ flutter_gen:
 
     # Assets.images.chip (default style)
     # style: dot-delimiter
-    exclude: 
+
+    outputs:
+      class_name: MyAssets
+
+    exclude:
       - assets/images/chip3/chip3.jpg
       - pictures/chip5.jpg
       - assets/flare/
 
   fonts:
     enabled: true
+    outputs:
+      class_name: MyFontFamily
 
   colors:
     enabled: true
+    outputs:
+      class_name: MyColorName
     inputs:
       - assets/color/colors.xml
       - assets/color/colors2.xml
diff --git a/packages/core/lib/flutter_generator.dart b/packages/core/lib/flutter_generator.dart
index 067b97ce9..16b8daaa0 100644
--- a/packages/core/lib/flutter_generator.dart
+++ b/packages/core/lib/flutter_generator.dart
@@ -76,11 +76,8 @@ class FlutterGenerator {
     }
 
     if (flutterGen.fonts.enabled && flutter.fonts.isNotEmpty) {
-      final generated = generateFonts(
-        formatter,
-        flutter.fonts,
-        genFonts: flutterGen.fonts,
-      );
+      final generated =
+          generateFonts(formatter, flutter.fonts, flutterGen.fonts);
       final fonts =
           File(normalize(join(pubspecFile.parent.path, output, fontsName)));
       writeAsString(generated, file: fonts);
diff --git a/packages/core/lib/generators/assets_generator.dart b/packages/core/lib/generators/assets_generator.dart
index accf25d1b..aff8c2d62 100644
--- a/packages/core/lib/generators/assets_generator.dart
+++ b/packages/core/lib/generators/assets_generator.dart
@@ -213,7 +213,7 @@ String _dotDelimiterStyleDefinition(
   List<Integration> integrations,
 ) {
   final buffer = StringBuffer();
-  final className = config.flutterGen.assets.outputs?.className;
+  final className = config.flutterGen.assets.outputs.className;
   final assetRelativePathList = _getAssetRelativePathList(
     config.rootPath,
     config.assets,
@@ -328,12 +328,12 @@ String _flatStyleDefinition(
       )
       .whereType<_Statement>()
       .toList();
-  final className = config.flutterGen.assets.outputs?.className;
+  final className = config.flutterGen.assets.outputs.className;
   return _flatStyleAssetsClassDefinition(className, statements);
 }
 
 String _flatStyleAssetsClassDefinition(
-  String? className,
+  String className,
   List<_Statement> statements,
 ) {
   final statementsBlock =
@@ -344,7 +344,7 @@ String _flatStyleAssetsClassDefinition(
 }
 
 String _dotDelimiterStyleAssetsClassDefinition(
-  String? className,
+  String className,
   List<_Statement> statements,
 ) {
   final statementsBlock =
@@ -352,10 +352,10 @@ String _dotDelimiterStyleAssetsClassDefinition(
   return _assetsClassDefinition(className, statementsBlock);
 }
 
-String _assetsClassDefinition(String? className, String statementsBlock) {
+String _assetsClassDefinition(String className, String statementsBlock) {
   return '''
-class ${className ?? 'Assets'} {
-  ${className ?? 'Assets'}._();
+class $className {
+  $className._();
   
   $statementsBlock
 }
diff --git a/packages/core/lib/generators/colors_generator.dart b/packages/core/lib/generators/colors_generator.dart
index e421637ff..db518b879 100644
--- a/packages/core/lib/generators/colors_generator.dart
+++ b/packages/core/lib/generators/colors_generator.dart
@@ -15,15 +15,15 @@ import 'generator_helper.dart';
 String generateColors(
   File pubspecFile,
   DartFormatter formatter,
-  FlutterGenColors genColors,
+  FlutterGenColors colorsConfig,
 ) {
-  if (genColors.inputs.isEmpty) {
+  if (colorsConfig.inputs.isEmpty) {
     throw const InvalidSettingsException(
         'The value of "flutter_gen/colors:" is incorrect.');
   }
 
   final buffer = StringBuffer();
-  final className = genColors.outputs?.className ?? 'ColorName';
+  final className = colorsConfig.outputs.className;
   buffer.writeln(header);
   buffer.writeln(ignore);
   buffer.writeln("import 'package:flutter/painting.dart';");
@@ -34,7 +34,7 @@ String generateColors(
   buffer.writeln();
 
   final colorList = <_Color>[];
-  genColors.inputs
+  colorsConfig.inputs
       .map((file) => ColorPath(join(pubspecFile.parent.path, file)))
       .forEach((colorFile) {
     final data = colorFile.file.readAsStringSync();
diff --git a/packages/core/lib/generators/fonts_generator.dart b/packages/core/lib/generators/fonts_generator.dart
index a67ccdd17..795e04088 100644
--- a/packages/core/lib/generators/fonts_generator.dart
+++ b/packages/core/lib/generators/fonts_generator.dart
@@ -10,16 +10,16 @@ import 'generator_helper.dart';
 
 String generateFonts(
   DartFormatter formatter,
-  List<FlutterFonts> fonts, {
-  FlutterGenFonts? genFonts,
-}) {
+  List<FlutterFonts> fonts,
+  FlutterGenFonts fontsConfig,
+) {
   if (fonts.isEmpty) {
     throw InvalidSettingsException(
         'The value of "flutter/fonts:" is incorrect.');
   }
 
   final buffer = StringBuffer();
-  final className = genFonts?.outputs?.className ?? 'FontFamily';
+  final className = fontsConfig.outputs.className;
   buffer.writeln(header);
   buffer.writeln(ignore);
   buffer.writeln('class $className {');
diff --git a/packages/core/lib/settings/pubspec.dart b/packages/core/lib/settings/pubspec.dart
index 5cb38a41e..150b2b989 100644
--- a/packages/core/lib/settings/pubspec.dart
+++ b/packages/core/lib/settings/pubspec.dart
@@ -28,7 +28,10 @@ class Pubspec {
 
 @JsonSerializable()
 class Flutter {
-  Flutter({required this.assets, required this.fonts});
+  Flutter({
+    required this.assets,
+    required this.fonts,
+  });
 
   @JsonKey(name: 'assets', required: true)
   final List<String> assets;
@@ -86,7 +89,7 @@ class FlutterGenColors {
   FlutterGenColors({
     required this.enabled,
     required this.inputs,
-    this.outputs,
+    required this.outputs,
   });
 
   @JsonKey(name: 'enabled', required: true)
@@ -95,8 +98,8 @@ class FlutterGenColors {
   @JsonKey(name: 'inputs', required: true)
   final List<String> inputs;
 
-  @JsonKey(name: 'outputs', required: false)
-  final FlutterGenElementOutputs? outputs;
+  @JsonKey(name: 'outputs', required: true)
+  final FlutterGenElementOutputs outputs;
 
   factory FlutterGenColors.fromJson(Map json) =>
       _$FlutterGenColorsFromJson(json);
@@ -112,7 +115,7 @@ class FlutterGenAssets {
     required this.enabled,
     required this.packageParameterEnabled,
     required this.style,
-    this.outputs,
+    required this.outputs,
     required this.exclude,
   }) {
     if (style != dotDelimiterStyle &&
@@ -131,8 +134,8 @@ class FlutterGenAssets {
   @JsonKey(name: 'style', required: true)
   final String style;
 
-  @JsonKey(name: 'outputs', required: false)
-  final FlutterGenElementOutputs? outputs;
+  @JsonKey(name: 'outputs', required: true)
+  final FlutterGenElementOutputs outputs;
 
   @JsonKey(name: 'exclude', required: true)
   final List<String> exclude;
@@ -149,13 +152,16 @@ class FlutterGenAssets {
 
 @JsonSerializable()
 class FlutterGenFonts {
-  FlutterGenFonts({required this.enabled, this.outputs});
+  FlutterGenFonts({
+    required this.enabled,
+    required this.outputs,
+  });
 
   @JsonKey(name: 'enabled', required: true)
   final bool enabled;
 
-  @JsonKey(name: 'outputs', required: false)
-  final FlutterGenElementOutputs? outputs;
+  @JsonKey(name: 'outputs', required: true)
+  final FlutterGenElementOutputs outputs;
 
   factory FlutterGenFonts.fromJson(Map json) => _$FlutterGenFontsFromJson(json);
 }
@@ -183,10 +189,10 @@ class FlutterGenIntegrations {
 
 @JsonSerializable()
 class FlutterGenElementOutputs {
-  FlutterGenElementOutputs({this.className});
+  FlutterGenElementOutputs({required this.className});
 
-  @JsonKey(name: 'class_name', required: false)
-  final String? className;
+  @JsonKey(name: 'class_name', required: true)
+  final String className;
 
   factory FlutterGenElementOutputs.fromJson(Map json) =>
       _$FlutterGenElementOutputsFromJson(json);
diff --git a/packages/core/lib/settings/pubspec.g.dart b/packages/core/lib/settings/pubspec.g.dart
index 15d7b4a66..4b96a1e1a 100644
--- a/packages/core/lib/settings/pubspec.g.dart
+++ b/packages/core/lib/settings/pubspec.g.dart
@@ -100,17 +100,14 @@ FlutterGenColors _$FlutterGenColorsFromJson(Map json) => $checkedCreate(
       ($checkedConvert) {
         $checkKeys(
           json,
-          requiredKeys: const ['enabled', 'inputs'],
+          requiredKeys: const ['enabled', 'inputs', 'outputs'],
         );
         final val = FlutterGenColors(
           enabled: $checkedConvert('enabled', (v) => v as bool),
           inputs: $checkedConvert('inputs',
               (v) => (v as List<dynamic>).map((e) => e as String).toList()),
           outputs: $checkedConvert(
-              'outputs',
-              (v) => v == null
-                  ? null
-                  : FlutterGenElementOutputs.fromJson(v as Map)),
+              'outputs', (v) => FlutterGenElementOutputs.fromJson(v as Map)),
         );
         return val;
       },
@@ -126,6 +123,7 @@ FlutterGenAssets _$FlutterGenAssetsFromJson(Map json) => $checkedCreate(
             'enabled',
             'package_parameter_enabled',
             'style',
+            'outputs',
             'exclude'
           ],
         );
@@ -135,10 +133,7 @@ FlutterGenAssets _$FlutterGenAssetsFromJson(Map json) => $checkedCreate(
               $checkedConvert('package_parameter_enabled', (v) => v as bool),
           style: $checkedConvert('style', (v) => v as String),
           outputs: $checkedConvert(
-              'outputs',
-              (v) => v == null
-                  ? null
-                  : FlutterGenElementOutputs.fromJson(v as Map)),
+              'outputs', (v) => FlutterGenElementOutputs.fromJson(v as Map)),
           exclude: $checkedConvert('exclude',
               (v) => (v as List<dynamic>).map((e) => e as String).toList()),
         );
@@ -155,15 +150,12 @@ FlutterGenFonts _$FlutterGenFontsFromJson(Map json) => $checkedCreate(
       ($checkedConvert) {
         $checkKeys(
           json,
-          requiredKeys: const ['enabled'],
+          requiredKeys: const ['enabled', 'outputs'],
         );
         final val = FlutterGenFonts(
           enabled: $checkedConvert('enabled', (v) => v as bool),
           outputs: $checkedConvert(
-              'outputs',
-              (v) => v == null
-                  ? null
-                  : FlutterGenElementOutputs.fromJson(v as Map)),
+              'outputs', (v) => FlutterGenElementOutputs.fromJson(v as Map)),
         );
         return val;
       },
@@ -196,8 +188,12 @@ FlutterGenElementOutputs _$FlutterGenElementOutputsFromJson(Map json) =>
       'FlutterGenElementOutputs',
       json,
       ($checkedConvert) {
+        $checkKeys(
+          json,
+          requiredKeys: const ['class_name'],
+        );
         final val = FlutterGenElementOutputs(
-          className: $checkedConvert('class_name', (v) => v as String?),
+          className: $checkedConvert('class_name', (v) => v as String),
         );
         return val;
       },
diff --git a/packages/core/test/assets_gen_test.dart b/packages/core/test/assets_gen_test.dart
index f1a5055fd..e8f1d16b9 100644
--- a/packages/core/test/assets_gen_test.dart
+++ b/packages/core/test/assets_gen_test.dart
@@ -84,5 +84,15 @@ void main() {
 
       await expectedAssetsGen(pubspec, generated, fact);
     });
+
+    test('Assets with change the class name', () async {
+      const pubspec = 'test_resources/pubspec_assets_change_class_name.yaml';
+      const fact =
+          'test_resources/actual_data/assets_change_class_name.gen.dart';
+      const generated =
+          'test_resources/lib/gen/assets_change_class_name.gen.dart';
+
+      await expectedAssetsGen(pubspec, generated, fact);
+    });
   });
 }
diff --git a/packages/core/test/colors_gen_test.dart b/packages/core/test/colors_gen_test.dart
index c03bb5a96..966bcc905 100644
--- a/packages/core/test/colors_gen_test.dart
+++ b/packages/core/test/colors_gen_test.dart
@@ -53,5 +53,15 @@ void main() {
           ColorPath('test_resources/assets/json/fruits.json');
       expect(wrongColorPath.isXml, isFalse);
     });
+
+    test('Change the class name', () async {
+      const pubspec = 'test_resources/pubspec_colors_change_class_name.yaml';
+      const fact =
+          'test_resources/actual_data/colors_change_class_name.gen.dart';
+      const generated =
+          'test_resources/lib/gen/colors_change_class_name.gen.dart';
+
+      await expectedColorsGen(pubspec, generated, fact);
+    });
   });
 }
diff --git a/packages/core/test/fonts_gen_test.dart b/packages/core/test/fonts_gen_test.dart
index c5bd99607..c37f88907 100644
--- a/packages/core/test/fonts_gen_test.dart
+++ b/packages/core/test/fonts_gen_test.dart
@@ -27,8 +27,19 @@ void main() {
           pageWidth: config.pubspec.flutterGen.lineLength, lineEnding: '\n');
 
       expect(() {
-        return generateFonts(formatter, config.pubspec.flutter.fonts);
+        return generateFonts(formatter, config.pubspec.flutter.fonts,
+            config.pubspec.flutterGen.fonts);
       }, throwsA(isA<InvalidSettingsException>()));
     });
+
+    test('Change the class name', () async {
+      const pubspec = 'test_resources/pubspec_fonts_change_class_name.yaml';
+      const fact =
+          'test_resources/actual_data/fonts_change_class_name.gen.dart';
+      const generated =
+          'test_resources/lib/gen/fonts_change_class_name.gen.dart';
+
+      await expectedFontsGen(pubspec, generated, fact);
+    });
   });
 }
diff --git a/packages/core/test/gen_test_helper.dart b/packages/core/test/gen_test_helper.dart
index ecdd137a6..1396e6f61 100644
--- a/packages/core/test/gen_test_helper.dart
+++ b/packages/core/test/gen_test_helper.dart
@@ -38,7 +38,8 @@ Future<void> expectedAssetsGen(
 /// Colors
 Future<void> expectedColorsGen(
     String pubspec, String generated, String fact) async {
-  await FlutterGenerator(File(pubspec)).build();
+  await FlutterGenerator(File(pubspec), colorsName: basename(generated))
+      .build();
 
   final pubspecFile = File(pubspec);
   final config = await loadPubspecConfig(pubspecFile);
@@ -47,7 +48,8 @@ Future<void> expectedColorsGen(
 
   final actual =
       generateColors(pubspecFile, formatter, config.pubspec.flutterGen.colors);
-  final expected = File(fact).readAsStringSync().replaceAll('\r\n', '\n');
+  final expected =
+      formatter.format(File(fact).readAsStringSync().replaceAll('\r\n', '\n'));
 
   expect(
     File(generated).readAsStringSync(),
@@ -59,15 +61,17 @@ Future<void> expectedColorsGen(
 /// Fonts
 Future<void> expectedFontsGen(
     String pubspec, String generated, String fact) async {
-  await FlutterGenerator(File(pubspec)).build();
+  await FlutterGenerator(File(pubspec), fontsName: basename(generated)).build();
 
   final pubspecFile = File(pubspec);
   final config = await loadPubspecConfig(pubspecFile);
   final formatter = DartFormatter(
       pageWidth: config.pubspec.flutterGen.lineLength, lineEnding: '\n');
 
-  final actual = generateFonts(formatter, config.pubspec.flutter.fonts);
-  final expected = File(fact).readAsStringSync().replaceAll('\r\n', '\n');
+  final actual = generateFonts(
+      formatter, config.pubspec.flutter.fonts, config.pubspec.flutterGen.fonts);
+  final expected =
+      formatter.format(File(fact).readAsStringSync().replaceAll('\r\n', '\n'));
 
   expect(
     File(generated).readAsStringSync(),
diff --git a/packages/core/test_resources/actual_data/assets_change_class_name.gen.dart b/packages/core/test_resources/actual_data/assets_change_class_name.gen.dart
new file mode 100644
index 000000000..f8f1b01a4
--- /dev/null
+++ b/packages/core/test_resources/actual_data/assets_change_class_name.gen.dart
@@ -0,0 +1,100 @@
+/// GENERATED CODE - DO NOT MODIFY BY HAND
+/// *****************************************************
+///  FlutterGen
+/// *****************************************************
+
+// coverage:ignore-file
+// ignore_for_file: type=lint
+// ignore_for_file: directives_ordering,unnecessary_import
+
+import 'package:flutter/widgets.dart';
+
+class $AssetsImagesGen {
+  const $AssetsImagesGen();
+
+  /// File path: assets/images/chip1.jpg
+  AssetGenImage get chip1 => const AssetGenImage('assets/images/chip1.jpg');
+
+  /// File path: assets/images/chip2.jpg
+  AssetGenImage get chip2 => const AssetGenImage('assets/images/chip2.jpg');
+
+  /// File path: assets/images/logo.png
+  AssetGenImage get logo => const AssetGenImage('assets/images/logo.png');
+
+  /// File path: assets/images/profile.jpg
+  AssetGenImage get profileJpg =>
+      const AssetGenImage('assets/images/profile.jpg');
+
+  /// File path: assets/images/profile.png
+  AssetGenImage get profilePng =>
+      const AssetGenImage('assets/images/profile.png');
+}
+
+class MyAssets {
+  MyAssets._();
+
+  static const $AssetsImagesGen images = $AssetsImagesGen();
+}
+
+class AssetGenImage {
+  const AssetGenImage(this._assetName);
+
+  final String _assetName;
+
+  Image image({
+    Key? key,
+    AssetBundle? bundle,
+    ImageFrameBuilder? frameBuilder,
+    ImageErrorWidgetBuilder? errorBuilder,
+    String? semanticLabel,
+    bool excludeFromSemantics = false,
+    double? scale,
+    double? width,
+    double? height,
+    Color? color,
+    Animation<double>? opacity,
+    BlendMode? colorBlendMode,
+    BoxFit? fit,
+    AlignmentGeometry alignment = Alignment.center,
+    ImageRepeat repeat = ImageRepeat.noRepeat,
+    Rect? centerSlice,
+    bool matchTextDirection = false,
+    bool gaplessPlayback = false,
+    bool isAntiAlias = false,
+    String? package,
+    FilterQuality filterQuality = FilterQuality.low,
+    int? cacheWidth,
+    int? cacheHeight,
+  }) {
+    return Image.asset(
+      _assetName,
+      key: key,
+      bundle: bundle,
+      frameBuilder: frameBuilder,
+      errorBuilder: errorBuilder,
+      semanticLabel: semanticLabel,
+      excludeFromSemantics: excludeFromSemantics,
+      scale: scale,
+      width: width,
+      height: height,
+      color: color,
+      opacity: opacity,
+      colorBlendMode: colorBlendMode,
+      fit: fit,
+      alignment: alignment,
+      repeat: repeat,
+      centerSlice: centerSlice,
+      matchTextDirection: matchTextDirection,
+      gaplessPlayback: gaplessPlayback,
+      isAntiAlias: isAntiAlias,
+      package: package,
+      filterQuality: filterQuality,
+      cacheWidth: cacheWidth,
+      cacheHeight: cacheHeight,
+    );
+  }
+
+  String get path => _assetName;
+
+  String get keyName => _assetName;
+}
diff --git a/packages/core/test_resources/actual_data/colors_change_class_name.gen.dart b/packages/core/test_resources/actual_data/colors_change_class_name.gen.dart
new file mode 100644
index 000000000..c47f7caec
--- /dev/null
+++ b/packages/core/test_resources/actual_data/colors_change_class_name.gen.dart
@@ -0,0 +1,96 @@
+/// GENERATED CODE - DO NOT MODIFY BY HAND
+/// *****************************************************
+///  FlutterGen
+/// *****************************************************
+
+// coverage:ignore-file
+// ignore_for_file: type=lint
+// ignore_for_file: directives_ordering,unnecessary_import
+
+import 'package:flutter/painting.dart';
+import 'package:flutter/material.dart';
+
+class MyColorName {
+  MyColorName._();
+
+  /// Color: #000000
+  static const Color black = Color(0xFF000000);
+
+  /// MaterialColor:
+  ///   50: #FFF9E5E5
+  ///   100: #FFF1BFBF
+  ///   200: #FFE79595
+  ///   300: #FFDD6A6A
+  ///   400: #FFD64A4A
+  ///   500: #FFCF2A2A
+  ///   600: #FFCA2525
+  ///   700: #FFC31F1F
+  ///   800: #FFBD1919
+  ///   900: #FFB20F0F
+  static const MaterialColor crimsonRed = MaterialColor(
+    0xFFCF2A2A,
+    <int, Color>{
+      50: Color(0xFFF9E5E5),
+      100: Color(0xFFF1BFBF),
+      200: Color(0xFFE79595),
+      300: Color(0xFFDD6A6A),
+      400: Color(0xFFD64A4A),
+      500: Color(0xFFCF2A2A),
+      600: Color(0xFFCA2525),
+      700: Color(0xFFC31F1F),
+      800: Color(0xFFBD1919),
+      900: Color(0xFFB20F0F),
+    },
+  );
+
+  /// Color: #979797
+  static const Color gray410 = Color(0xFF979797);
+
+  /// Color: #EEEEEE
+  static const Color gray70 = Color(0xFFEEEEEE);
+
+  /// Color: #FFFFFF
+  static const Color white = Color(0xFFFFFFFF);
+
+  /// MaterialColor:
+  ///   50: #FFFBF2E5
+  ///   100: #FFF5DFBE
+  ///   200: #FFEFCA93
+  ///   300: #FFE9B568
+  ///   400: #FFE4A547
+  ///   500: #FFDF9527
+  ///   600: #FFDB8D23
+  ///   700: #FFD7821D
+  ///   800: #FFD27817
+  ///   900: #FFCA670E
+  static const MaterialColor yellowOcher = MaterialColor(
+    0xFFDF9527,
+    <int, Color>{
+      50: Color(0xFFFBF2E5),
+      100: Color(0xFFF5DFBE),
+      200: Color(0xFFEFCA93),
+      300: Color(0xFFE9B568),
+      400: Color(0xFFE4A547),
+      500: Color(0xFFDF9527),
+      600: Color(0xFFDB8D23),
+      700: Color(0xFFD7821D),
+      800: Color(0xFFD27817),
+      900: Color(0xFFCA670E),
+    },
+  );
+
+  /// MaterialAccentColor:
+  ///   100: #FFFFE8E0
+  ///   200: #FFFFBCA3
+  ///   400: #FFFFA989
+  ///   700: #FFFF9E7A
+  static const MaterialAccentColor yellowOcherAccent = MaterialAccentColor(
+    0xFFFFBCA3,
+    <int, Color>{
+      100: Color(0xFFFFE8E0),
+      200: Color(0xFFFFBCA3),
+      400: Color(0xFFFFA989),
+      700: Color(0xFFFF9E7A),
+    },
+  );
+}
diff --git a/packages/core/test_resources/actual_data/fonts_change_class_name.gen.dart b/packages/core/test_resources/actual_data/fonts_change_class_name.gen.dart
new file mode 100644
index 000000000..d9606a9f5
--- /dev/null
+++ b/packages/core/test_resources/actual_data/fonts_change_class_name.gen.dart
@@ -0,0 +1,15 @@
+/// GENERATED CODE - DO NOT MODIFY BY HAND
+/// *****************************************************
+///  FlutterGen
+/// *****************************************************
+
+// coverage:ignore-file
+// ignore_for_file: type=lint
+// ignore_for_file: directives_ordering,unnecessary_import
+
+class MyFontFamily {
+  MyFontFamily._();
+
+  /// Font family: Raleway
+  static const String raleway = 'Raleway';
+}
diff --git a/packages/core/test_resources/pubspec_assets_change_class_name.yaml b/packages/core/test_resources/pubspec_assets_change_class_name.yaml
new file mode 100644
index 000000000..10b3c2027
--- /dev/null
+++ b/packages/core/test_resources/pubspec_assets_change_class_name.yaml
@@ -0,0 +1,13 @@
+name: test
+
+flutter_gen:
+  output: lib/gen/ # Optional (default: lib/gen/)
+  line_length: 80   # Optional (default: 80)
+
+  assets:
+    outputs:
+      class_name: MyAssets
+
+flutter:
+  assets:
+    - assets/images
diff --git a/packages/core/test_resources/pubspec_colors_change_class_name.yaml b/packages/core/test_resources/pubspec_colors_change_class_name.yaml
new file mode 100644
index 000000000..7f28947e1
--- /dev/null
+++ b/packages/core/test_resources/pubspec_colors_change_class_name.yaml
@@ -0,0 +1,11 @@
+name: test
+
+flutter_gen:
+  output: lib/gen/ # Optional (default: lib/gen/)
+  line_length: 80 # Optional (default: 80)
+
+  colors:
+    outputs:
+      class_name: MyColorName
+    inputs:
+      - assets/color/colors.xml
diff --git a/packages/core/test_resources/pubspec_fonts_change_class_name.yaml b/packages/core/test_resources/pubspec_fonts_change_class_name.yaml
new file mode 100644
index 000000000..a19c1de14
--- /dev/null
+++ b/packages/core/test_resources/pubspec_fonts_change_class_name.yaml
@@ -0,0 +1,18 @@
+name: test
+
+flutter_gen:
+  output: lib/gen/ # Optional (default: lib/gen/)
+  line_length: 80 # Optional (default: 80)
+
+
+  fonts:
+    outputs:
+      class_name: MyFontFamily
+
+flutter:
+  fonts:
+    - family: Raleway
+      fonts:
+        - asset: assets/fonts/Raleway-Regular.ttf
+        - asset: assets/fonts/Raleway-Italic.ttf
+          style: italic