diff --git a/bin/internal/engine.version b/bin/internal/engine.version
index 9471c512ccd..072bbac42d5 100644
--- a/bin/internal/engine.version
+++ b/bin/internal/engine.version
@@ -1 +1 @@
-67254d6e4b0369fa83418cf9e9ff68b21c529765
+8d83b98c55b3d0839de0c4201f5a8d56dbf92d2f
diff --git a/dev/automated_tests/pubspec.yaml b/dev/automated_tests/pubspec.yaml
index fc9014775a6..5ddc94cd7f5 100644
--- a/dev/automated_tests/pubspec.yaml
+++ b/dev/automated_tests/pubspec.yaml
@@ -1,7 +1,7 @@
 name: flutter_automated_tests
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/benchmarks/complex_layout/pubspec.yaml b/dev/benchmarks/complex_layout/pubspec.yaml
index 2525ce9d1fa..2b87c0adc9a 100644
--- a/dev/benchmarks/complex_layout/pubspec.yaml
+++ b/dev/benchmarks/complex_layout/pubspec.yaml
@@ -2,7 +2,7 @@ name: complex_layout
 description: A benchmark of a relatively complex layout.
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/benchmarks/macrobenchmarks/pubspec.yaml b/dev/benchmarks/macrobenchmarks/pubspec.yaml
index b1e58fa5637..d8f6b988718 100644
--- a/dev/benchmarks/macrobenchmarks/pubspec.yaml
+++ b/dev/benchmarks/macrobenchmarks/pubspec.yaml
@@ -2,7 +2,7 @@ name: macrobenchmarks
 description: Performance benchmarks using flutter drive.
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/benchmarks/microbenchmarks/pubspec.yaml b/dev/benchmarks/microbenchmarks/pubspec.yaml
index 93fb7995434..8cac43e6f38 100644
--- a/dev/benchmarks/microbenchmarks/pubspec.yaml
+++ b/dev/benchmarks/microbenchmarks/pubspec.yaml
@@ -2,7 +2,7 @@ name: microbenchmarks
 description: Small benchmarks for very specific parts of the Flutter framework.
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   meta: 1.8.0
diff --git a/dev/benchmarks/multiple_flutters/module/pubspec.yaml b/dev/benchmarks/multiple_flutters/module/pubspec.yaml
index 12d128d2a6b..f601fd8abc8 100644
--- a/dev/benchmarks/multiple_flutters/module/pubspec.yaml
+++ b/dev/benchmarks/multiple_flutters/module/pubspec.yaml
@@ -4,7 +4,7 @@ description: A module that is embedded in the multiple_flutters benchmark test.
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/benchmarks/platform_channels_benchmarks/pubspec.yaml b/dev/benchmarks/platform_channels_benchmarks/pubspec.yaml
index 908500cf2b8..7a65a39e6c2 100644
--- a/dev/benchmarks/platform_channels_benchmarks/pubspec.yaml
+++ b/dev/benchmarks/platform_channels_benchmarks/pubspec.yaml
@@ -5,7 +5,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/benchmarks/platform_views_layout/pubspec.yaml b/dev/benchmarks/platform_views_layout/pubspec.yaml
index 40b3cf9ce90..ecbe18af8f5 100644
--- a/dev/benchmarks/platform_views_layout/pubspec.yaml
+++ b/dev/benchmarks/platform_views_layout/pubspec.yaml
@@ -2,7 +2,7 @@ name: platform_views_layout
 description: A benchmark for platform views.
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/benchmarks/platform_views_layout_hybrid_composition/pubspec.yaml b/dev/benchmarks/platform_views_layout_hybrid_composition/pubspec.yaml
index 1f0097bb0f4..563229913ac 100644
--- a/dev/benchmarks/platform_views_layout_hybrid_composition/pubspec.yaml
+++ b/dev/benchmarks/platform_views_layout_hybrid_composition/pubspec.yaml
@@ -2,7 +2,7 @@ name: platform_views_layout_hybrid_composition
 description: A benchmark for platform views, using hybrid composition on android.
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/benchmarks/test_apps/stocks/pubspec.yaml b/dev/benchmarks/test_apps/stocks/pubspec.yaml
index ed85f8bae33..e62b8ff9a99 100644
--- a/dev/benchmarks/test_apps/stocks/pubspec.yaml
+++ b/dev/benchmarks/test_apps/stocks/pubspec.yaml
@@ -1,7 +1,7 @@
 name: stocks
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/bots/pubspec.yaml b/dev/bots/pubspec.yaml
index 48a361df46a..9747eff9102 100644
--- a/dev/bots/pubspec.yaml
+++ b/dev/bots/pubspec.yaml
@@ -2,7 +2,7 @@ name: tests_on_bots
 description: Scripts which run on bots.
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   args: 2.3.1
diff --git a/dev/conductor/core/pubspec.yaml b/dev/conductor/core/pubspec.yaml
index aca9675a118..d06e4228052 100644
--- a/dev/conductor/core/pubspec.yaml
+++ b/dev/conductor/core/pubspec.yaml
@@ -4,7 +4,7 @@ description: Flutter Automated Release Tool
 publish_to: none
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   archive: 3.3.2
diff --git a/dev/customer_testing/pubspec.yaml b/dev/customer_testing/pubspec.yaml
index 761d57f8648..fa0c77905e8 100644
--- a/dev/customer_testing/pubspec.yaml
+++ b/dev/customer_testing/pubspec.yaml
@@ -2,7 +2,7 @@ name: customer_testing
 description: Tool to run the tests listed in the flutter/tests repository.
 
 environment:
-  sdk: '>=2.17.0-0 <3.0.0'
+  sdk: '>=2.17.0-0 <4.0.0'
 
 dependencies:
   args: 2.3.1
diff --git a/dev/devicelab/bin/tasks/gradle_desugar_classes_test.dart b/dev/devicelab/bin/tasks/gradle_desugar_classes_test.dart
index 4fe64d52d08..ec6cec85adc 100644
--- a/dev/devicelab/bin/tasks/gradle_desugar_classes_test.dart
+++ b/dev/devicelab/bin/tasks/gradle_desugar_classes_test.dart
@@ -15,7 +15,8 @@ Future<void> main() async {
     try {
       await runProjectTest((FlutterProject flutterProject) async {
         section('APK contains plugin classes');
-        flutterProject.addPlugin('google_maps_flutter', value: '^1.0.10');
+        await flutterProject.setMinSdkVersion(20);
+        flutterProject.addPlugin('google_maps_flutter', value: '^2.2.1');
 
         await inDirectory(flutterProject.rootPath, () async {
           await flutter('build', options: <String>[
diff --git a/dev/devicelab/bin/tasks/module_test_ios.dart b/dev/devicelab/bin/tasks/module_test_ios.dart
index f2322c3c0a7..86d47afe357 100644
--- a/dev/devicelab/bin/tasks/module_test_ios.dart
+++ b/dev/devicelab/bin/tasks/module_test_ios.dart
@@ -170,7 +170,7 @@ Future<void> main() async {
         '''
 dependencies:
   url_launcher: 6.0.20
-  android_alarm_manager: 0.4.5+11
+  android_alarm_manager: 2.0.2
   google_sign_in_ios: 5.5.0
   $dartPluginName:
     path: ../$dartPluginName
diff --git a/dev/devicelab/bin/tasks/plugin_dependencies_test.dart b/dev/devicelab/bin/tasks/plugin_dependencies_test.dart
index 26d8dada3af..fa2bd9e90dc 100644
--- a/dev/devicelab/bin/tasks/plugin_dependencies_test.dart
+++ b/dev/devicelab/bin/tasks/plugin_dependencies_test.dart
@@ -101,7 +101,7 @@ dependencies:
     sdk: flutter
 
 environment:
-  sdk: ">=2.0.0-dev.28.0 <3.0.0"
+  sdk: ">=2.0.0-dev.28.0 <4.0.0"
   flutter: ">=1.5.0"
 ''', flush: true);
 
diff --git a/dev/devicelab/lib/framework/apk_utils.dart b/dev/devicelab/lib/framework/apk_utils.dart
index e9a989cefd2..e79bd6b5e1d 100644
--- a/dev/devicelab/lib/framework/apk_utils.dart
+++ b/dev/devicelab/lib/framework/apk_utils.dart
@@ -287,6 +287,20 @@ android {
     pubspec.writeAsStringSync(content, flush: true);
   }
 
+  Future<void> setMinSdkVersion(int sdkVersion) async {
+    final File buildScript = File(
+      path.join(androidPath, 'app', 'build.gradle'),
+    );
+
+    buildScript.openWrite(mode: FileMode.append).write('''
+android {
+    defaultConfig {
+        minSdkVersion $sdkVersion
+    }
+}
+    ''');
+  }
+
   Future<void> getPackages() async {
     await inDirectory(Directory(rootPath), () async {
       await flutter('pub', options: <String>['get']);
diff --git a/dev/devicelab/pubspec.yaml b/dev/devicelab/pubspec.yaml
index c988e9a6a71..a6dc98aaeb3 100644
--- a/dev/devicelab/pubspec.yaml
+++ b/dev/devicelab/pubspec.yaml
@@ -3,7 +3,7 @@ description: Flutter continuous integration performance and correctness tests.
 homepage: https://github.com/flutter/flutter
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   archive: 3.3.2
diff --git a/dev/docs/platform_integration/pubspec.yaml b/dev/docs/platform_integration/pubspec.yaml
index e56e23d2b05..bb60d621c47 100644
--- a/dev/docs/platform_integration/pubspec.yaml
+++ b/dev/docs/platform_integration/pubspec.yaml
@@ -1,4 +1,4 @@
 name: platform_integration
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
diff --git a/dev/forbidden_from_release_tests/pubspec.yaml b/dev/forbidden_from_release_tests/pubspec.yaml
index f1ca8df5886..cdee1c9ba64 100644
--- a/dev/forbidden_from_release_tests/pubspec.yaml
+++ b/dev/forbidden_from_release_tests/pubspec.yaml
@@ -2,7 +2,7 @@ name: forbidden_from_release_tests
 publish_to: 'none'
 
 environment:
-  sdk: '>=2.17.0-0 <3.0.0'
+  sdk: '>=2.17.0-0 <4.0.0'
 
 dependencies:
   args: 2.3.1
diff --git a/dev/integration_tests/abstract_method_smoke_test/pubspec.yaml b/dev/integration_tests/abstract_method_smoke_test/pubspec.yaml
index 574e7d7087f..ad67cfa39ca 100644
--- a/dev/integration_tests/abstract_method_smoke_test/pubspec.yaml
+++ b/dev/integration_tests/abstract_method_smoke_test/pubspec.yaml
@@ -4,7 +4,7 @@ description: A new Flutter project.
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/integration_tests/android_embedding_v2_smoke_test/pubspec.yaml b/dev/integration_tests/android_embedding_v2_smoke_test/pubspec.yaml
index a9ed6c6f180..bf241be79f0 100644
--- a/dev/integration_tests/android_embedding_v2_smoke_test/pubspec.yaml
+++ b/dev/integration_tests/android_embedding_v2_smoke_test/pubspec.yaml
@@ -14,7 +14,7 @@ description: A new Flutter project.
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/integration_tests/android_semantics_testing/pubspec.yaml b/dev/integration_tests/android_semantics_testing/pubspec.yaml
index e09fa1c4196..bacd717bab8 100644
--- a/dev/integration_tests/android_semantics_testing/pubspec.yaml
+++ b/dev/integration_tests/android_semantics_testing/pubspec.yaml
@@ -1,7 +1,7 @@
 name: android_semantics_testing
 description: Integration testing library for Android semantics
 environment:
-  sdk: '>=2.17.0-0 <3.0.0'
+  sdk: '>=2.17.0-0 <4.0.0'
 
 dependencies:
   flutter:
diff --git a/dev/integration_tests/android_views/pubspec.yaml b/dev/integration_tests/android_views/pubspec.yaml
index 6d38686f89f..d02be80efb9 100644
--- a/dev/integration_tests/android_views/pubspec.yaml
+++ b/dev/integration_tests/android_views/pubspec.yaml
@@ -4,7 +4,7 @@ publish_to: none
 description: An integration test for embedded platform views
 version: 1.0.0+1
 environment:
-  sdk: '>=2.17.0-0 <3.0.0'
+  sdk: '>=2.17.0-0 <4.0.0'
 
 dependencies:
   flutter:
diff --git a/dev/integration_tests/channels/pubspec.yaml b/dev/integration_tests/channels/pubspec.yaml
index fd430d273cf..a4f5fbbcd53 100644
--- a/dev/integration_tests/channels/pubspec.yaml
+++ b/dev/integration_tests/channels/pubspec.yaml
@@ -2,7 +2,7 @@ name: channels
 description: Integration test for platform channels.
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/integration_tests/deferred_components_test/pubspec.yaml b/dev/integration_tests/deferred_components_test/pubspec.yaml
index 06dc851c3d7..55e62304ae9 100644
--- a/dev/integration_tests/deferred_components_test/pubspec.yaml
+++ b/dev/integration_tests/deferred_components_test/pubspec.yaml
@@ -3,7 +3,7 @@ description: Integration test application for basic deferred components function
 publish_to: 'none'
 version: 1.0.0+1
 environment:
-  sdk: '>=2.17.0-0 <3.0.0'
+  sdk: '>=2.17.0-0 <4.0.0'
 
 dependencies:
   flutter:
diff --git a/dev/integration_tests/external_ui/pubspec.yaml b/dev/integration_tests/external_ui/pubspec.yaml
index ca9407b7f4f..36f3db98a87 100644
--- a/dev/integration_tests/external_ui/pubspec.yaml
+++ b/dev/integration_tests/external_ui/pubspec.yaml
@@ -2,7 +2,7 @@ name: external_ui
 description: A test of Flutter integrating external UIs.
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/integration_tests/flavors/pubspec.yaml b/dev/integration_tests/flavors/pubspec.yaml
index a87e62550f9..94293f889a8 100644
--- a/dev/integration_tests/flavors/pubspec.yaml
+++ b/dev/integration_tests/flavors/pubspec.yaml
@@ -2,7 +2,7 @@ name: flavors
 description: Integration test for build flavors.
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/integration_tests/flutter_gallery/pubspec.yaml b/dev/integration_tests/flutter_gallery/pubspec.yaml
index 9440b69a84c..cfc5f5a7dfd 100644
--- a/dev/integration_tests/flutter_gallery/pubspec.yaml
+++ b/dev/integration_tests/flutter_gallery/pubspec.yaml
@@ -1,7 +1,7 @@
 name: flutter_gallery
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
@@ -20,7 +20,7 @@ dependencies:
     git:
       url: https://github.com/kevmoo/scoped_model.git
       ref: null_safety
-  shrine_images: 1.1.2
+  shrine_images: 2.0.1
 
   # Also update dev/benchmarks/complex_layout/pubspec.yaml
   # and dev/benchmarks/macrobenchmarks/pubspec.yaml
diff --git a/dev/integration_tests/gradle_deprecated_settings/pubspec.yaml b/dev/integration_tests/gradle_deprecated_settings/pubspec.yaml
index cd92473dc0e..527084dd434 100644
--- a/dev/integration_tests/gradle_deprecated_settings/pubspec.yaml
+++ b/dev/integration_tests/gradle_deprecated_settings/pubspec.yaml
@@ -2,7 +2,7 @@ name: gradle_deprecated_settings
 description: Integration test for the current settings.gradle.
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/integration_tests/hybrid_android_views/pubspec.yaml b/dev/integration_tests/hybrid_android_views/pubspec.yaml
index 5fe5c7dd323..1f7dab52969 100644
--- a/dev/integration_tests/hybrid_android_views/pubspec.yaml
+++ b/dev/integration_tests/hybrid_android_views/pubspec.yaml
@@ -4,7 +4,7 @@ publish_to: none
 description: An integration test for hybrid composition on Android
 version: 1.0.0+1
 environment:
-  sdk: '>=2.17.0-0 <3.0.0'
+  sdk: '>=2.17.0-0 <4.0.0'
 
 dependencies:
   flutter:
diff --git a/dev/integration_tests/ios_add2app_life_cycle/flutterapp/pubspec.yaml b/dev/integration_tests/ios_add2app_life_cycle/flutterapp/pubspec.yaml
index 6ac8a9405c6..82dd676480a 100644
--- a/dev/integration_tests/ios_add2app_life_cycle/flutterapp/pubspec.yaml
+++ b/dev/integration_tests/ios_add2app_life_cycle/flutterapp/pubspec.yaml
@@ -14,7 +14,7 @@ description: A new flutter module project.
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/integration_tests/ios_app_with_extensions/pubspec.yaml b/dev/integration_tests/ios_app_with_extensions/pubspec.yaml
index 1f8d016396c..b9912f64ead 100644
--- a/dev/integration_tests/ios_app_with_extensions/pubspec.yaml
+++ b/dev/integration_tests/ios_app_with_extensions/pubspec.yaml
@@ -13,7 +13,7 @@ name: ios_app_with_extensions
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/integration_tests/ios_platform_view_tests/pubspec.yaml b/dev/integration_tests/ios_platform_view_tests/pubspec.yaml
index f535c7ee5c7..1e2af467372 100644
--- a/dev/integration_tests/ios_platform_view_tests/pubspec.yaml
+++ b/dev/integration_tests/ios_platform_view_tests/pubspec.yaml
@@ -3,7 +3,7 @@ name: ios_platform_view_tests
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/integration_tests/non_nullable/pubspec.yaml b/dev/integration_tests/non_nullable/pubspec.yaml
index 595ce00d5c0..daea3229aca 100644
--- a/dev/integration_tests/non_nullable/pubspec.yaml
+++ b/dev/integration_tests/non_nullable/pubspec.yaml
@@ -5,7 +5,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/integration_tests/platform_interaction/pubspec.yaml b/dev/integration_tests/platform_interaction/pubspec.yaml
index f700ef0a9da..b6ce71adad2 100644
--- a/dev/integration_tests/platform_interaction/pubspec.yaml
+++ b/dev/integration_tests/platform_interaction/pubspec.yaml
@@ -2,7 +2,7 @@ name: platform_interaction
 description: Integration test for platform interactions.
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/integration_tests/release_smoke_test/pubspec.yaml b/dev/integration_tests/release_smoke_test/pubspec.yaml
index efb3269e72f..37b2a4feb5e 100644
--- a/dev/integration_tests/release_smoke_test/pubspec.yaml
+++ b/dev/integration_tests/release_smoke_test/pubspec.yaml
@@ -1,7 +1,7 @@
 name: release_smoke_test
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/integration_tests/spell_check/pubspec.yaml b/dev/integration_tests/spell_check/pubspec.yaml
index 228c9fee628..816bbcdf082 100644
--- a/dev/integration_tests/spell_check/pubspec.yaml
+++ b/dev/integration_tests/spell_check/pubspec.yaml
@@ -18,7 +18,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: '>=2.18.0-149.0.dev <3.0.0'
+  sdk: '>=2.18.0-149.0.dev <4.0.0'
 
 # Dependencies specify other packages that your package needs in order to work.
 # To automatically upgrade your package dependencies to the latest versions
diff --git a/dev/integration_tests/ui/pubspec.yaml b/dev/integration_tests/ui/pubspec.yaml
index 4a0cc9b1041..94d7a13eeca 100644
--- a/dev/integration_tests/ui/pubspec.yaml
+++ b/dev/integration_tests/ui/pubspec.yaml
@@ -2,7 +2,7 @@ name: integration_ui
 description: Flutter non-plugin UI integration tests.
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/integration_tests/web/pubspec.yaml b/dev/integration_tests/web/pubspec.yaml
index 891688a221c..17171c06c40 100644
--- a/dev/integration_tests/web/pubspec.yaml
+++ b/dev/integration_tests/web/pubspec.yaml
@@ -2,7 +2,7 @@ name: web_integration
 description: Integration test for web compilation.
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 flutter:
   assets:
diff --git a/dev/integration_tests/web_compile_tests/pubspec.yaml b/dev/integration_tests/web_compile_tests/pubspec.yaml
index e3af760f7a3..764ef90b332 100644
--- a/dev/integration_tests/web_compile_tests/pubspec.yaml
+++ b/dev/integration_tests/web_compile_tests/pubspec.yaml
@@ -1,6 +1,6 @@
 name: web_compile_tests
 environment:
-  sdk: '>=2.17.0-0 <3.0.0'
+  sdk: '>=2.17.0-0 <4.0.0'
 
 dependencies:
   flutter:
diff --git a/dev/integration_tests/web_e2e_tests/pubspec.yaml b/dev/integration_tests/web_e2e_tests/pubspec.yaml
index d68faff9bfd..16c32a05f5d 100644
--- a/dev/integration_tests/web_e2e_tests/pubspec.yaml
+++ b/dev/integration_tests/web_e2e_tests/pubspec.yaml
@@ -2,7 +2,7 @@ name: web_e2e_tests
 publish_to: none
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 flutter:
   assets:
diff --git a/dev/integration_tests/windows_startup_test/pubspec.yaml b/dev/integration_tests/windows_startup_test/pubspec.yaml
index 9615ec6be0e..c364506ec7f 100644
--- a/dev/integration_tests/windows_startup_test/pubspec.yaml
+++ b/dev/integration_tests/windows_startup_test/pubspec.yaml
@@ -2,7 +2,7 @@ name: windows_startup_test
 description: Integration test for Windows app's startup.
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/manual_tests/pubspec.yaml b/dev/manual_tests/pubspec.yaml
index 403c342c5a5..fd31fe3bf79 100644
--- a/dev/manual_tests/pubspec.yaml
+++ b/dev/manual_tests/pubspec.yaml
@@ -1,7 +1,7 @@
 name: manual_tests
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/missing_dependency_tests/pubspec.yaml b/dev/missing_dependency_tests/pubspec.yaml
index bd8d667b1ea..ebed8816e98 100644
--- a/dev/missing_dependency_tests/pubspec.yaml
+++ b/dev/missing_dependency_tests/pubspec.yaml
@@ -1,7 +1,7 @@
 name: missing_dependency_tests
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/tools/dartdoc.dart b/dev/tools/dartdoc.dart
index 7c9ffaf009d..f577cadd946 100644
--- a/dev/tools/dartdoc.dart
+++ b/dev/tools/dartdoc.dart
@@ -59,7 +59,7 @@ Future<void> main(List<String> arguments) async {
   buf.writeln('homepage: https://flutter.dev');
   buf.writeln('version: 0.0.0');
   buf.writeln('environment:');
-  buf.writeln("  sdk: '>=2.10.0 <3.0.0'");
+  buf.writeln("  sdk: '>=2.10.0 <4.0.0'");
   buf.writeln('dependencies:');
   for (final String package in findPackageNames()) {
     buf.writeln('  $package:');
diff --git a/dev/tools/gen_defaults/pubspec.yaml b/dev/tools/gen_defaults/pubspec.yaml
index 2f42ef652a0..ed298d766c6 100644
--- a/dev/tools/gen_defaults/pubspec.yaml
+++ b/dev/tools/gen_defaults/pubspec.yaml
@@ -3,7 +3,7 @@ description: A command line script to generate Material component defaults from
 version: 1.0.0
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
 
diff --git a/dev/tools/gen_keycodes/pubspec.yaml b/dev/tools/gen_keycodes/pubspec.yaml
index 985e4195d1b..08c98045681 100644
--- a/dev/tools/gen_keycodes/pubspec.yaml
+++ b/dev/tools/gen_keycodes/pubspec.yaml
@@ -2,7 +2,7 @@ name: gen_keycodes
 description: Generates keycode source files from various resources.
 
 environment:
-  sdk: ">=2.18.0-0 <3.0.0"
+  sdk: ">=2.18.0-0 <4.0.0"
 
 dependencies:
   args: 2.3.1
diff --git a/dev/tools/pubspec.yaml b/dev/tools/pubspec.yaml
index 07931974c71..7fb6252daaa 100644
--- a/dev/tools/pubspec.yaml
+++ b/dev/tools/pubspec.yaml
@@ -2,7 +2,7 @@ name: dev_tools
 description: Various repository development tools for flutter.
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   archive: 3.3.2
diff --git a/dev/tools/vitool/pubspec.yaml b/dev/tools/vitool/pubspec.yaml
index 2cb22f6082f..d2e8ee37fc2 100644
--- a/dev/tools/vitool/pubspec.yaml
+++ b/dev/tools/vitool/pubspec.yaml
@@ -4,7 +4,7 @@ version: 0.0.1
 homepage: https://flutter.dev
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/dev/tracing_tests/pubspec.yaml b/dev/tracing_tests/pubspec.yaml
index ba218b47eae..e8937ed9691 100644
--- a/dev/tracing_tests/pubspec.yaml
+++ b/dev/tracing_tests/pubspec.yaml
@@ -2,7 +2,7 @@ name: tracing_tests
 description: Various tests for tracing in flutter/flutter
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/examples/api/pubspec.yaml b/examples/api/pubspec.yaml
index 9646c0c9278..40695ebde95 100644
--- a/examples/api/pubspec.yaml
+++ b/examples/api/pubspec.yaml
@@ -7,7 +7,7 @@ publish_to: 'none'
 version: 1.0.0
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
   flutter: ">=2.5.0-6.0.pre.30 <3.0.0"
 
 dependencies:
diff --git a/examples/flutter_view/pubspec.yaml b/examples/flutter_view/pubspec.yaml
index 4be70dd1bde..03b0f21e429 100644
--- a/examples/flutter_view/pubspec.yaml
+++ b/examples/flutter_view/pubspec.yaml
@@ -2,7 +2,7 @@ name: flutter_view
 description: A new flutter project.
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/examples/hello_world/pubspec.yaml b/examples/hello_world/pubspec.yaml
index 9b92c2858a1..1fd49c7803b 100644
--- a/examples/hello_world/pubspec.yaml
+++ b/examples/hello_world/pubspec.yaml
@@ -1,7 +1,7 @@
 name: hello_world
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/examples/image_list/pubspec.yaml b/examples/image_list/pubspec.yaml
index a9181400761..12a7b7ddf57 100644
--- a/examples/image_list/pubspec.yaml
+++ b/examples/image_list/pubspec.yaml
@@ -4,7 +4,7 @@ description: Simple Flutter project used for benchmarking image loading over net
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/examples/layers/pubspec.yaml b/examples/layers/pubspec.yaml
index b56c8e79734..7a32fc09fa0 100644
--- a/examples/layers/pubspec.yaml
+++ b/examples/layers/pubspec.yaml
@@ -1,7 +1,7 @@
 name: flutter_examples_layers
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/examples/platform_channel/pubspec.yaml b/examples/platform_channel/pubspec.yaml
index 13036da9fd6..166c45ad029 100644
--- a/examples/platform_channel/pubspec.yaml
+++ b/examples/platform_channel/pubspec.yaml
@@ -1,7 +1,7 @@
 name: platform_channel
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/examples/platform_channel_swift/pubspec.yaml b/examples/platform_channel_swift/pubspec.yaml
index e2f38d0c0da..c6b168a170e 100644
--- a/examples/platform_channel_swift/pubspec.yaml
+++ b/examples/platform_channel_swift/pubspec.yaml
@@ -1,7 +1,7 @@
 name: platform_channel_swift
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/examples/platform_view/pubspec.yaml b/examples/platform_view/pubspec.yaml
index 025e7316214..62aad0c1078 100644
--- a/examples/platform_view/pubspec.yaml
+++ b/examples/platform_view/pubspec.yaml
@@ -1,7 +1,7 @@
 name: platform_view
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/examples/splash/pubspec.yaml b/examples/splash/pubspec.yaml
index 7e1bc369c8a..8a5ccb9ecf2 100644
--- a/examples/splash/pubspec.yaml
+++ b/examples/splash/pubspec.yaml
@@ -1,7 +1,7 @@
 name: splash
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/packages/flutter/pubspec.yaml b/packages/flutter/pubspec.yaml
index ede82b6dac8..559f90ebc04 100644
--- a/packages/flutter/pubspec.yaml
+++ b/packages/flutter/pubspec.yaml
@@ -3,7 +3,7 @@ description: A framework for writing Flutter applications
 homepage: https://flutter.dev
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   # To update these, use "flutter update-packages --force-upgrade".
diff --git a/packages/flutter/test_private/pubspec.yaml b/packages/flutter/test_private/pubspec.yaml
index 30fabe9a80e..ebfc1efaffa 100644
--- a/packages/flutter/test_private/pubspec.yaml
+++ b/packages/flutter/test_private/pubspec.yaml
@@ -2,7 +2,7 @@ name: flutter_test_private
 description: Tests private interfaces of the flutter
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   # To update these, use "flutter update-packages --force-upgrade".
diff --git a/packages/flutter/test_private/test/pubspec.yaml b/packages/flutter/test_private/test/pubspec.yaml
index 37e60ba555e..0a62c7c130f 100644
--- a/packages/flutter/test_private/test/pubspec.yaml
+++ b/packages/flutter/test_private/test/pubspec.yaml
@@ -1,7 +1,7 @@
 name: animated_icons_private_test
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   # To update these, use "flutter update-packages --force-upgrade".
diff --git a/packages/flutter_driver/pubspec.yaml b/packages/flutter_driver/pubspec.yaml
index dff59deeb74..7b7295a8be1 100644
--- a/packages/flutter_driver/pubspec.yaml
+++ b/packages/flutter_driver/pubspec.yaml
@@ -3,7 +3,7 @@ description: Integration and performance test API for Flutter applications
 homepage: https://flutter.dev
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   file: 6.1.4
diff --git a/packages/flutter_goldens/pubspec.yaml b/packages/flutter_goldens/pubspec.yaml
index d69dcd5fd50..26b5489159d 100644
--- a/packages/flutter_goldens/pubspec.yaml
+++ b/packages/flutter_goldens/pubspec.yaml
@@ -1,7 +1,7 @@
 name: flutter_goldens
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   # To update these, use "flutter update-packages --force-upgrade".
diff --git a/packages/flutter_goldens_client/pubspec.yaml b/packages/flutter_goldens_client/pubspec.yaml
index d9efaed2c5d..9cfec36f06c 100644
--- a/packages/flutter_goldens_client/pubspec.yaml
+++ b/packages/flutter_goldens_client/pubspec.yaml
@@ -1,7 +1,7 @@
 name: flutter_goldens_client
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   # To update these, use "flutter update-packages --force-upgrade".
diff --git a/packages/flutter_localizations/pubspec.yaml b/packages/flutter_localizations/pubspec.yaml
index 3cfda8d2a93..79da1e0d363 100644
--- a/packages/flutter_localizations/pubspec.yaml
+++ b/packages/flutter_localizations/pubspec.yaml
@@ -1,7 +1,7 @@
 name: flutter_localizations
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   # To update these, use "flutter update-packages --force-upgrade".
diff --git a/packages/flutter_test/pubspec.yaml b/packages/flutter_test/pubspec.yaml
index fe6b7dcfb86..71b0e31f378 100644
--- a/packages/flutter_test/pubspec.yaml
+++ b/packages/flutter_test/pubspec.yaml
@@ -1,7 +1,7 @@
 name: flutter_test
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   # To update these, use "flutter update-packages --force-upgrade".
diff --git a/packages/flutter_test/test/test_config/project_root/pubspec.yaml b/packages/flutter_test/test/test_config/project_root/pubspec.yaml
index 8a39bec6b8f..30c83394c6c 100644
--- a/packages/flutter_test/test/test_config/project_root/pubspec.yaml
+++ b/packages/flutter_test/test/test_config/project_root/pubspec.yaml
@@ -4,6 +4,6 @@
 name: dummy
 
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: '>=2.12.0 <4.0.0'
 
 # PUBSPEC CHECKSUM: 0000
diff --git a/packages/flutter_tools/lib/src/commands/update_packages.dart b/packages/flutter_tools/lib/src/commands/update_packages.dart
index ffaf2264572..aa83b5a8564 100644
--- a/packages/flutter_tools/lib/src/commands/update_packages.dart
+++ b/packages/flutter_tools/lib/src/commands/update_packages.dart
@@ -1427,7 +1427,7 @@ String generateFakePubspec(
   final bool verbose = doUpgrade;
   result.writeln('name: flutter_update_packages');
   result.writeln('environment:');
-  result.writeln("  sdk: '>=2.10.0 <3.0.0'");
+  result.writeln("  sdk: '>=2.10.0 <4.0.0'");
   result.writeln('dependencies:');
   overrides.writeln('dependency_overrides:');
   if (kManuallyPinnedDependencies.isNotEmpty) {
@@ -1640,7 +1640,7 @@ Directory createTemporaryFlutterSdk(
     // Fill in SDK dependency constraint.
     output.write('''
 environment:
-  sdk: ">=2.7.0 <3.0.0"
+  sdk: ">=2.7.0 <4.0.0"
 ''');
 
     output.writeln('dependencies:');
@@ -1672,7 +1672,7 @@ description: Dart SDK extensions for dart:ui
 homepage: http://flutter.io
 # sky_engine requires sdk_ext support in the analyzer which was added in 1.11.x
 environment:
-  sdk: '>=1.11.0 <3.0.0'
+  sdk: '>=1.11.0 <4.0.0'
 ''');
 
   return directory;
diff --git a/packages/flutter_tools/pubspec.yaml b/packages/flutter_tools/pubspec.yaml
index 91dafbe172c..acacff48c68 100644
--- a/packages/flutter_tools/pubspec.yaml
+++ b/packages/flutter_tools/pubspec.yaml
@@ -3,7 +3,7 @@ description: Tools for building Flutter applications
 homepage: https://flutter.dev
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   # To update these, use "flutter update-packages --force-upgrade".
diff --git a/packages/flutter_tools/test/commands.shard/hermetic/analyze_continuously_test.dart b/packages/flutter_tools/test/commands.shard/hermetic/analyze_continuously_test.dart
index 3039279c1f8..fabc5afe607 100644
--- a/packages/flutter_tools/test/commands.shard/hermetic/analyze_continuously_test.dart
+++ b/packages/flutter_tools/test/commands.shard/hermetic/analyze_continuously_test.dart
@@ -60,7 +60,7 @@ void main() {
     pubspecFile.writeAsStringSync('''
   name: foo_project
   environment:
-    sdk: '>=2.10.0 <3.0.0'
+    sdk: '>=2.10.0 <4.0.0'
   ''');
 
     final File dartFile = fileSystem.file(fileSystem.path.join(directory.path, 'lib', 'main.dart'));
diff --git a/packages/flutter_tools/test/commands.shard/hermetic/update_packages_test.dart b/packages/flutter_tools/test/commands.shard/hermetic/update_packages_test.dart
index 2f205b53e98..ced2dd0c45c 100644
--- a/packages/flutter_tools/test/commands.shard/hermetic/update_packages_test.dart
+++ b/packages/flutter_tools/test/commands.shard/hermetic/update_packages_test.dart
@@ -24,7 +24,7 @@ description: A framework for writing Flutter applications
 homepage: http://flutter.dev
 
 environment:
-  sdk: ">=2.2.2 <3.0.0"
+  sdk: ">=2.2.2 <4.0.0"
 
 dependencies:
   # To update these, use "flutter update-packages --force-upgrade".
@@ -61,7 +61,7 @@ homepage: http://flutter.dev
 version: 1.0.0
 
 environment:
-  sdk: ">=2.14.0-383.0.dev <3.0.0"
+  sdk: ">=2.14.0-383.0.dev <4.0.0"
   flutter: ">=2.5.0-6.0.pre.30 <3.0.0"
 
 dependencies:
diff --git a/packages/flutter_tools/test/data/asset_test/font/pubspec.yaml b/packages/flutter_tools/test/data/asset_test/font/pubspec.yaml
index 10e62a85641..654dc759028 100644
--- a/packages/flutter_tools/test/data/asset_test/font/pubspec.yaml
+++ b/packages/flutter_tools/test/data/asset_test/font/pubspec.yaml
@@ -2,7 +2,7 @@ name: font
 description: A test project that contains a font.
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
+  sdk: ">=2.12.0 <4.0.0"
 
 flutter:
   uses-material-design: true
diff --git a/packages/flutter_tools/test/data/asset_test/main/pubspec.yaml b/packages/flutter_tools/test/data/asset_test/main/pubspec.yaml
index 5a898f9ec01..2e1e9152ca7 100644
--- a/packages/flutter_tools/test/data/asset_test/main/pubspec.yaml
+++ b/packages/flutter_tools/test/data/asset_test/main/pubspec.yaml
@@ -2,7 +2,7 @@ name: main
 description: A test project that has a package with a font as a dependency.
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
+  sdk: ">=2.12.0 <4.0.0"
 
 dependencies:
   font:
diff --git a/packages/flutter_tools/test/general.shard/build_system/targets/dart_plugin_registrant_test.dart b/packages/flutter_tools/test/general.shard/build_system/targets/dart_plugin_registrant_test.dart
index 9bce7978277..67d79aa9987 100644
--- a/packages/flutter_tools/test/general.shard/build_system/targets/dart_plugin_registrant_test.dart
+++ b/packages/flutter_tools/test/general.shard/build_system/targets/dart_plugin_registrant_test.dart
@@ -86,7 +86,7 @@ flutter:
         pluginClass: none
 
 environment:
-  sdk: ">=2.12.0-259.9.beta <3.0.0"
+  sdk: ">=2.12.0-259.9.beta <4.0.0"
   flutter: ">=1.20.0"
 ''';
 
diff --git a/packages/flutter_tools/test/general.shard/test/test_compiler_test.dart b/packages/flutter_tools/test/general.shard/test/test_compiler_test.dart
index bd2bb06d079..9d2da366868 100644
--- a/packages/flutter_tools/test/general.shard/test/test_compiler_test.dart
+++ b/packages/flutter_tools/test/general.shard/test/test_compiler_test.dart
@@ -166,7 +166,7 @@ flutter:
       linux:
         dartPluginClass: APlugin
 environment:
-  sdk: ">=2.14.0 <3.0.0"
+  sdk: ">=2.14.0 <4.0.0"
   flutter: ">=2.5.0"
 ''');
 
diff --git a/packages/flutter_tools/test/general.shard/update_packages_test.dart b/packages/flutter_tools/test/general.shard/update_packages_test.dart
index 32f74455435..9a57293a9b9 100644
--- a/packages/flutter_tools/test/general.shard/update_packages_test.dart
+++ b/packages/flutter_tools/test/general.shard/update_packages_test.dart
@@ -17,7 +17,7 @@ description: A framework for writing Flutter applications
 homepage: http://flutter.dev
 
 environment:
-  sdk: '>=2.2.2 <3.0.0'
+  sdk: '>=2.2.2 <4.0.0'
 
 dependencies:
   # To update these, use "flutter update-packages --force-upgrade".
@@ -51,7 +51,7 @@ description: A dummy pubspec with no dependencies
 homepage: http://flutter.dev
 
 environment:
-  sdk: ">=2.2.2 <3.0.0"
+  sdk: ">=2.2.2 <4.0.0"
 ''';
 
 const String kInvalidGitPubspec = '''
@@ -60,7 +60,7 @@ description: A framework for writing Flutter applications
 homepage: http://flutter.dev
 
 environment:
-  sdk: ">=2.2.2 <3.0.0"
+  sdk: ">=2.2.2 <4.0.0"
 
 dependencies:
   # To update these, use "flutter update-packages --force-upgrade".
diff --git a/packages/flutter_tools/test/integration.shard/analyze_once_test.dart b/packages/flutter_tools/test/integration.shard/analyze_once_test.dart
index 5b3b3488a92..72f13e6890e 100644
--- a/packages/flutter_tools/test/integration.shard/analyze_once_test.dart
+++ b/packages/flutter_tools/test/integration.shard/analyze_once_test.dart
@@ -465,7 +465,7 @@ class _MyHomePageState extends State<MyHomePage> {
 const String pubspecYamlSrc = r'''
 name: flutter_project
 environment:
-  sdk: ">=2.1.0 <3.0.0"
+  sdk: ">=2.1.0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/packages/flutter_tools/test/integration.shard/break_on_framework_exceptions_test.dart b/packages/flutter_tools/test/integration.shard/break_on_framework_exceptions_test.dart
index 960361dec9e..57762ba6a6a 100644
--- a/packages/flutter_tools/test/integration.shard/break_on_framework_exceptions_test.dart
+++ b/packages/flutter_tools/test/integration.shard/break_on_framework_exceptions_test.dart
@@ -731,7 +731,7 @@ class TestProject extends Project {
   final String pubspec = '''
     name: test
     environment:
-      sdk: '>=2.12.0-0 <3.0.0'
+      sdk: '>=2.12.0-0 <4.0.0'
 
     dependencies:
       flutter:
diff --git a/packages/flutter_tools/test/integration.shard/flutter_build_null_unsafe_test.dart b/packages/flutter_tools/test/integration.shard/flutter_build_null_unsafe_test.dart
index 10326feed5b..b4f6705c5c8 100644
--- a/packages/flutter_tools/test/integration.shard/flutter_build_null_unsafe_test.dart
+++ b/packages/flutter_tools/test/integration.shard/flutter_build_null_unsafe_test.dart
@@ -45,7 +45,7 @@ void main() {
     writeFile(fileSystem.path.join(projectRoot.path, 'pubspec.yaml'), '''
 name: hello
 environment:
-  sdk: '>=2.12.0 <3.0.0'
+  sdk: '>=2.12.0 <4.0.0'
 ''');
     writeFile(fileSystem.path.join(projectRoot.path, 'lib', 'main.dart'), '''
 import 'unsafe.dart';
diff --git a/packages/flutter_tools/test/integration.shard/test_data/background_project.dart b/packages/flutter_tools/test/integration.shard/test_data/background_project.dart
index 270f3a45416..0fccff366c2 100644
--- a/packages/flutter_tools/test/integration.shard/test_data/background_project.dart
+++ b/packages/flutter_tools/test/integration.shard/test_data/background_project.dart
@@ -12,7 +12,7 @@ class BackgroundProject extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: ">=2.12.0-0 <3.0.0"
+    sdk: ">=2.12.0-0 <4.0.0"
 
   dependencies:
     flutter:
@@ -63,7 +63,7 @@ class RepeatingBackgroundProject extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: ">=2.12.0-0 <3.0.0"
+    sdk: ">=2.12.0-0 <4.0.0"
 
   dependencies:
     flutter:
diff --git a/packages/flutter_tools/test/integration.shard/test_data/basic_project.dart b/packages/flutter_tools/test/integration.shard/test_data/basic_project.dart
index 12a77fed9c8..3f3c031cddc 100644
--- a/packages/flutter_tools/test/integration.shard/test_data/basic_project.dart
+++ b/packages/flutter_tools/test/integration.shard/test_data/basic_project.dart
@@ -10,7 +10,7 @@ class BasicProject extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: '>=2.12.0-0 <3.0.0'
+    sdk: '>=2.12.0-0 <4.0.0'
 
   dependencies:
     flutter:
@@ -63,7 +63,7 @@ class BasicProjectThatThrows extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: '>=2.12.0-0 <3.0.0'
+    sdk: '>=2.12.0-0 <4.0.0'
 
   dependencies:
     flutter:
@@ -120,7 +120,7 @@ class BasicProjectWithTimelineTraces extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: '>=2.12.0-0 <3.0.0'
+    sdk: '>=2.12.0-0 <4.0.0'
 
   dependencies:
     flutter:
@@ -169,7 +169,7 @@ class BasicProjectWithFlutterGen extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: '>=2.12.0-0 <3.0.0'
+    sdk: '>=2.12.0-0 <4.0.0'
 
   dependencies:
     flutter:
@@ -181,8 +181,6 @@ class BasicProjectWithFlutterGen extends Project {
 
   @override
   final String main = r'''
-  // @dart = 2.8
-  // generated package does not support null safety.
   import 'dart:async';
   import 'package:flutter_gen/flutter_gen.dart';
 
@@ -196,7 +194,7 @@ class BasicProjectWithUnaryMain extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: '>=2.12.0-0 <3.0.0'
+    sdk: '>=2.12.0-0 <4.0.0'
   dependencies:
     flutter:
       sdk: flutter
diff --git a/packages/flutter_tools/test/integration.shard/test_data/compile_error_project.dart b/packages/flutter_tools/test/integration.shard/test_data/compile_error_project.dart
index 2732b38ba97..1ba2f5b6280 100644
--- a/packages/flutter_tools/test/integration.shard/test_data/compile_error_project.dart
+++ b/packages/flutter_tools/test/integration.shard/test_data/compile_error_project.dart
@@ -10,7 +10,7 @@ class CompileErrorProject extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: '>=2.12.0-0 <3.0.0'
+    sdk: '>=2.12.0-0 <4.0.0'
 
   dependencies:
     flutter:
diff --git a/packages/flutter_tools/test/integration.shard/test_data/deferred_components_project.dart b/packages/flutter_tools/test/integration.shard/test_data/deferred_components_project.dart
index b5ea7c6ea3e..b135962465f 100644
--- a/packages/flutter_tools/test/integration.shard/test_data/deferred_components_project.dart
+++ b/packages/flutter_tools/test/integration.shard/test_data/deferred_components_project.dart
@@ -13,7 +13,7 @@ class DeferredComponentsProject extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: ">=2.12.0-0 <3.0.0"
+    sdk: ">=2.12.0-0 <4.0.0"
 
   dependencies:
     flutter:
diff --git a/packages/flutter_tools/test/integration.shard/test_data/gen_l10n_project.dart b/packages/flutter_tools/test/integration.shard/test_data/gen_l10n_project.dart
index 0723fe5b723..13639aa3efb 100644
--- a/packages/flutter_tools/test/integration.shard/test_data/gen_l10n_project.dart
+++ b/packages/flutter_tools/test/integration.shard/test_data/gen_l10n_project.dart
@@ -34,7 +34,7 @@ class GenL10nProject extends Project {
   final String pubspec = '''
 name: test_l10n_project
 environment:
-  sdk: ">=2.12.0-0 <3.0.0"
+  sdk: ">=2.12.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/packages/flutter_tools/test/integration.shard/test_data/hot_reload_const_project.dart b/packages/flutter_tools/test/integration.shard/test_data/hot_reload_const_project.dart
index 0a2a1456ac9..d6d9c086a86 100644
--- a/packages/flutter_tools/test/integration.shard/test_data/hot_reload_const_project.dart
+++ b/packages/flutter_tools/test/integration.shard/test_data/hot_reload_const_project.dart
@@ -10,7 +10,7 @@ class HotReloadConstProject extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: ">=2.12.0-0 <3.0.0"
+    sdk: ">=2.12.0-0 <4.0.0"
 
   dependencies:
     flutter:
diff --git a/packages/flutter_tools/test/integration.shard/test_data/hot_reload_project.dart b/packages/flutter_tools/test/integration.shard/test_data/hot_reload_project.dart
index 4ddb5be40ad..c61082b8a1e 100644
--- a/packages/flutter_tools/test/integration.shard/test_data/hot_reload_project.dart
+++ b/packages/flutter_tools/test/integration.shard/test_data/hot_reload_project.dart
@@ -12,7 +12,7 @@ class HotReloadProject extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: ">=2.12.0-0 <3.0.0"
+    sdk: ">=2.12.0-0 <4.0.0"
 
   dependencies:
     flutter:
diff --git a/packages/flutter_tools/test/integration.shard/test_data/hot_reload_with_asset.dart b/packages/flutter_tools/test/integration.shard/test_data/hot_reload_with_asset.dart
index 6cd7dc7dca0..ae26ac4e68b 100644
--- a/packages/flutter_tools/test/integration.shard/test_data/hot_reload_with_asset.dart
+++ b/packages/flutter_tools/test/integration.shard/test_data/hot_reload_with_asset.dart
@@ -10,7 +10,7 @@ class HotReloadWithAssetProject extends Project {
   final String pubspec = '''
 name: test
 environment:
-  sdk: '>=2.12.0-0 <3.0.0'
+  sdk: '>=2.12.0-0 <4.0.0'
 
 dependencies:
   flutter:
diff --git a/packages/flutter_tools/test/integration.shard/test_data/integration_tests_project.dart b/packages/flutter_tools/test/integration.shard/test_data/integration_tests_project.dart
index 8d24a8523c1..1a5c0ad67af 100644
--- a/packages/flutter_tools/test/integration.shard/test_data/integration_tests_project.dart
+++ b/packages/flutter_tools/test/integration.shard/test_data/integration_tests_project.dart
@@ -14,7 +14,7 @@ class IntegrationTestsProject extends Project implements TestsProject {
   final String pubspec = '''
   name: test
   environment:
-    sdk: '>=2.12.0-0 <3.0.0'
+    sdk: '>=2.12.0-0 <4.0.0'
 
   dependencies:
     flutter:
diff --git a/packages/flutter_tools/test/integration.shard/test_data/migrate_project.dart b/packages/flutter_tools/test/integration.shard/test_data/migrate_project.dart
index e14d8b15978..7b1b1872528 100644
--- a/packages/flutter_tools/test/integration.shard/test_data/migrate_project.dart
+++ b/packages/flutter_tools/test/integration.shard/test_data/migrate_project.dart
@@ -176,7 +176,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.6.0 <3.0.0"
+  sdk: ">=2.6.0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/packages/flutter_tools/test/integration.shard/test_data/multidex_project.dart b/packages/flutter_tools/test/integration.shard/test_data/multidex_project.dart
index 2b0fc25b289..26964c4f444 100644
--- a/packages/flutter_tools/test/integration.shard/test_data/multidex_project.dart
+++ b/packages/flutter_tools/test/integration.shard/test_data/multidex_project.dart
@@ -56,7 +56,7 @@ class MultidexProject extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: ">=2.12.0-0 <3.0.0"
+    sdk: ">=2.12.0-0 <4.0.0"
 
   dependencies:
     flutter:
diff --git a/packages/flutter_tools/test/integration.shard/test_data/project_with_early_error.dart b/packages/flutter_tools/test/integration.shard/test_data/project_with_early_error.dart
index 7578d6559c7..9c90f4981ac 100644
--- a/packages/flutter_tools/test/integration.shard/test_data/project_with_early_error.dart
+++ b/packages/flutter_tools/test/integration.shard/test_data/project_with_early_error.dart
@@ -10,7 +10,7 @@ class ProjectWithEarlyError extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: ">=2.12.0-0 <3.0.0"
+    sdk: ">=2.12.0-0 <4.0.0"
 
   dependencies:
     flutter:
diff --git a/packages/flutter_tools/test/integration.shard/test_data/single_widget_reload_project.dart b/packages/flutter_tools/test/integration.shard/test_data/single_widget_reload_project.dart
index 083a0c04d30..690c71a2af9 100644
--- a/packages/flutter_tools/test/integration.shard/test_data/single_widget_reload_project.dart
+++ b/packages/flutter_tools/test/integration.shard/test_data/single_widget_reload_project.dart
@@ -10,7 +10,7 @@ class SingleWidgetReloadProject extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: ">=2.12.0-0 <3.0.0"
+    sdk: ">=2.12.0-0 <4.0.0"
 
   dependencies:
     flutter:
diff --git a/packages/flutter_tools/test/integration.shard/test_data/stateless_stateful_project.dart b/packages/flutter_tools/test/integration.shard/test_data/stateless_stateful_project.dart
index 5d89cb914e2..e1c312ce94d 100644
--- a/packages/flutter_tools/test/integration.shard/test_data/stateless_stateful_project.dart
+++ b/packages/flutter_tools/test/integration.shard/test_data/stateless_stateful_project.dart
@@ -10,7 +10,7 @@ class HotReloadProject extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: ">=2.12.0-0 <3.0.0"
+    sdk: ">=2.12.0-0 <4.0.0"
 
   dependencies:
     flutter:
diff --git a/packages/flutter_tools/test/integration.shard/test_data/stepping_project.dart b/packages/flutter_tools/test/integration.shard/test_data/stepping_project.dart
index d3a2bec2ca0..ce51fe469f1 100644
--- a/packages/flutter_tools/test/integration.shard/test_data/stepping_project.dart
+++ b/packages/flutter_tools/test/integration.shard/test_data/stepping_project.dart
@@ -9,7 +9,7 @@ class SteppingProject extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: '>=2.12.0-0 <3.0.0'
+    sdk: '>=2.12.0-0 <4.0.0'
   dependencies:
     flutter:
       sdk: flutter
@@ -65,7 +65,7 @@ class WebSteppingProject extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: '>=2.10.0 <3.0.0'
+    sdk: '>=2.10.0 <4.0.0'
   dependencies:
     flutter:
       sdk: flutter
diff --git a/packages/flutter_tools/test/integration.shard/test_data/test_project.dart b/packages/flutter_tools/test/integration.shard/test_data/test_project.dart
index 02b3c1a9a61..77b62a44982 100644
--- a/packages/flutter_tools/test/integration.shard/test_data/test_project.dart
+++ b/packages/flutter_tools/test/integration.shard/test_data/test_project.dart
@@ -10,7 +10,7 @@ class TestProject extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: '>=2.12.0-0 <3.0.0'
+    sdk: '>=2.12.0-0 <4.0.0'
 
   dependencies:
     flutter:
diff --git a/packages/flutter_tools/test/integration.shard/test_data/tests_project.dart b/packages/flutter_tools/test/integration.shard/test_data/tests_project.dart
index 80984677ee8..308e16a38fa 100644
--- a/packages/flutter_tools/test/integration.shard/test_data/tests_project.dart
+++ b/packages/flutter_tools/test/integration.shard/test_data/tests_project.dart
@@ -13,7 +13,7 @@ class TestsProject extends Project {
   final String pubspec = '''
   name: test
   environment:
-    sdk: '>=2.12.0-0 <3.0.0'
+    sdk: '>=2.12.0-0 <4.0.0'
 
   dependencies:
     flutter:
diff --git a/packages/flutter_tools/test/integration.shard/web_plugin_registrant_test.dart b/packages/flutter_tools/test/integration.shard/web_plugin_registrant_test.dart
index 3702715601e..9477b7d8ac4 100644
--- a/packages/flutter_tools/test/integration.shard/web_plugin_registrant_test.dart
+++ b/packages/flutter_tools/test/integration.shard/web_plugin_registrant_test.dart
@@ -80,19 +80,17 @@ void main() {
     ),
   });
 
-  testUsingContext('generated plugin registrant passes analysis without null safety', () async {
+  testUsingContext('generated plugin registrant passes analysis with null safety', () async {
     await _createProject(projectDir, <String>[]);
     // We need a dependency so the plugin registrant is not completely empty.
     await _editPubspecFile(projectDir,
       _composeEditors(<PubspecEditor>[
         _addDependencyEditor('shared_preferences', version: '^2.0.0'),
 
-        // This turns null safety off
-        _setDartSDKVersionEditor('>=2.11.0 <3.0.0'),
+        _setDartSDKVersionEditor('>=2.12.0 <4.0.0'),
       ]));
 
-    // The generated main.dart file has a bunch of stuff that is invalid without null safety, so
-    // replace it with a no-op dummy main file. We aren't testing it in this scenario anyway.
+    // Replace main file with a no-op dummy. We aren't testing it in this scenario anyway.
     await _replaceMainFile(projectDir, 'void main() {}');
 
     // The plugin registrant is created on build...
diff --git a/packages/flutter_web_plugins/pubspec.yaml b/packages/flutter_web_plugins/pubspec.yaml
index ab20c5183ce..d6e576b9078 100644
--- a/packages/flutter_web_plugins/pubspec.yaml
+++ b/packages/flutter_web_plugins/pubspec.yaml
@@ -3,7 +3,7 @@ description: Library to register Flutter Web plugins
 homepage: https://flutter.dev
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/packages/fuchsia_remote_debug_protocol/pubspec.yaml b/packages/fuchsia_remote_debug_protocol/pubspec.yaml
index f99f50e4af2..1eb33b077ad 100644
--- a/packages/fuchsia_remote_debug_protocol/pubspec.yaml
+++ b/packages/fuchsia_remote_debug_protocol/pubspec.yaml
@@ -4,7 +4,7 @@ description: Provides an API to test/debug Flutter applications on remote Fuchsi
 homepage: https://flutter.dev
 
 environment:
-  sdk: '>=2.12.0-0 <3.0.0'
+  sdk: '>=2.12.0-0 <4.0.0'
 
 dependencies:
   process: 4.2.4
diff --git a/packages/integration_test/example/pubspec.yaml b/packages/integration_test/example/pubspec.yaml
index 44957a65ec7..a4781a35c6c 100644
--- a/packages/integration_test/example/pubspec.yaml
+++ b/packages/integration_test/example/pubspec.yaml
@@ -3,7 +3,7 @@ description: Demonstrates how to use the integration_test plugin.
 publish_to: 'none'
 
 environment:
-  sdk: '>=2.12.0-0 <3.0.0'
+  sdk: '>=2.12.0-0 <4.0.0'
   flutter: ">=1.6.7"
 
 dependencies:
diff --git a/packages/integration_test/integration_test_macos/pubspec.yaml b/packages/integration_test/integration_test_macos/pubspec.yaml
index 1860af77060..ae3911318eb 100644
--- a/packages/integration_test/integration_test_macos/pubspec.yaml
+++ b/packages/integration_test/integration_test_macos/pubspec.yaml
@@ -10,7 +10,7 @@ flutter:
         pluginClass: IntegrationTestPlugin
 
 environment:
-  sdk: ">=2.17.0-0 <3.0.0"
+  sdk: ">=2.17.0-0 <4.0.0"
 
 dependencies:
   flutter:
diff --git a/packages/integration_test/pubspec.yaml b/packages/integration_test/pubspec.yaml
index f2215ab4de6..245862d4ea4 100644
--- a/packages/integration_test/pubspec.yaml
+++ b/packages/integration_test/pubspec.yaml
@@ -3,7 +3,7 @@ description: Runs tests that use the flutter_test API as integration tests.
 publish_to: none
 
 environment:
-  sdk: '>=2.12.0-0 <3.0.0'
+  sdk: '>=2.12.0-0 <4.0.0'
 
 dependencies:
   flutter: