diff --git a/packages/connectivity/connectivity/CHANGELOG.md b/packages/connectivity/connectivity/CHANGELOG.md
index 8e2802ab5b04..da6d3184f30c 100644
--- a/packages/connectivity/connectivity/CHANGELOG.md
+++ b/packages/connectivity/connectivity/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 2.0.1
+
+* Opt out of null safety.
+
 ## 2.0.0
 
 * [Breaking Change] The `getWifiName`, `getWifiBSSID` and `getWifiIP` are removed to [wifi_info_flutter](https://github.com/flutter/plugins/tree/master/packages/wifi_info_flutter)
diff --git a/packages/connectivity/connectivity/lib/connectivity.dart b/packages/connectivity/connectivity/lib/connectivity.dart
index c9655365f772..4aa365f24191 100644
--- a/packages/connectivity/connectivity/lib/connectivity.dart
+++ b/packages/connectivity/connectivity/lib/connectivity.dart
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.9
+
 import 'dart:async';
 
 import 'package:connectivity_platform_interface/connectivity_platform_interface.dart';
diff --git a/packages/connectivity/connectivity/pubspec.yaml b/packages/connectivity/connectivity/pubspec.yaml
index af26f703d8b9..597222b505ec 100644
--- a/packages/connectivity/connectivity/pubspec.yaml
+++ b/packages/connectivity/connectivity/pubspec.yaml
@@ -2,7 +2,7 @@ name: connectivity
 description: Flutter plugin for discovering the state of the network (WiFi &
   mobile/cellular) connectivity on Android and iOS.
 homepage: https://github.com/flutter/plugins/tree/master/packages/connectivity/connectivity
-version: 2.0.0
+version: 2.0.1
 
 flutter:
   plugin:
diff --git a/packages/connectivity/connectivity_platform_interface/CHANGELOG.md b/packages/connectivity/connectivity_platform_interface/CHANGELOG.md
index e45f8f7e4d99..3ac1d25c6a24 100644
--- a/packages/connectivity/connectivity_platform_interface/CHANGELOG.md
+++ b/packages/connectivity/connectivity_platform_interface/CHANGELOG.md
@@ -1,10 +1,14 @@
+## 1.0.7
+
+* Opt out of null safety.
+
 ## 1.0.6
 
 * Update lower bound of dart dependency to 2.1.0.
 
 ## 1.0.5
 
-* Remove dart:io Platform checks from the MethodChannel implementation. This is 
+* Remove dart:io Platform checks from the MethodChannel implementation. This is
 tripping the analysis of other versions of the plugin.
 
 ## 1.0.4
diff --git a/packages/connectivity/connectivity_platform_interface/lib/connectivity_platform_interface.dart b/packages/connectivity/connectivity_platform_interface/lib/connectivity_platform_interface.dart
index cfd9cf648a9c..2691459553c7 100644
--- a/packages/connectivity/connectivity_platform_interface/lib/connectivity_platform_interface.dart
+++ b/packages/connectivity/connectivity_platform_interface/lib/connectivity_platform_interface.dart
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.9
+
 import 'dart:async';
 
 import 'package:plugin_platform_interface/plugin_platform_interface.dart';
diff --git a/packages/connectivity/connectivity_platform_interface/pubspec.yaml b/packages/connectivity/connectivity_platform_interface/pubspec.yaml
index 5bafcf9b806b..4e069c06433b 100644
--- a/packages/connectivity/connectivity_platform_interface/pubspec.yaml
+++ b/packages/connectivity/connectivity_platform_interface/pubspec.yaml
@@ -3,7 +3,7 @@ description: A common platform interface for the connectivity plugin.
 homepage: https://github.com/flutter/plugins/tree/master/packages/connectivity/connectivity_platform_interface
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 1.0.6
+version: 1.0.7
 
 dependencies:
   flutter:
diff --git a/packages/device_info/device_info/CHANGELOG.md b/packages/device_info/device_info/CHANGELOG.md
index 836d56232f95..aa05171094bf 100644
--- a/packages/device_info/device_info/CHANGELOG.md
+++ b/packages/device_info/device_info/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 0.4.2+10
+
+* Opt out of null safety.
+
 ## 0.4.2+9
 
 * Update android compileSdkVersion to 29.
diff --git a/packages/device_info/device_info/lib/device_info.dart b/packages/device_info/device_info/lib/device_info.dart
index f63730c4323f..50f99300b6c3 100644
--- a/packages/device_info/device_info/lib/device_info.dart
+++ b/packages/device_info/device_info/lib/device_info.dart
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.9
+
 import 'dart:async';
 import 'package:device_info_platform_interface/device_info_platform_interface.dart';
 
diff --git a/packages/device_info/device_info/pubspec.yaml b/packages/device_info/device_info/pubspec.yaml
index bf36bf6f34d9..f041e3e6374d 100644
--- a/packages/device_info/device_info/pubspec.yaml
+++ b/packages/device_info/device_info/pubspec.yaml
@@ -5,7 +5,7 @@ homepage: https://github.com/flutter/plugins/tree/master/packages/device_info
 # 0.4.y+z is compatible with 1.0.0, if you land a breaking change bump
 # the version to 2.0.0.
 # See more details: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0
-version: 0.4.2+9
+version: 0.4.2+10
 
 flutter:
   plugin:
diff --git a/packages/device_info/device_info_platform_interface/CHANGELOG.md b/packages/device_info/device_info_platform_interface/CHANGELOG.md
index 8a7eb6c46be3..7e50001a39a5 100644
--- a/packages/device_info/device_info_platform_interface/CHANGELOG.md
+++ b/packages/device_info/device_info_platform_interface/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.2
+
+- Opt out of null safety.
+
 ## 1.0.1
 
 - Documentation typo fixed.
diff --git a/packages/device_info/device_info_platform_interface/lib/device_info_platform_interface.dart b/packages/device_info/device_info_platform_interface/lib/device_info_platform_interface.dart
index 808b7adf9dc7..313eb3d1bc14 100644
--- a/packages/device_info/device_info_platform_interface/lib/device_info_platform_interface.dart
+++ b/packages/device_info/device_info_platform_interface/lib/device_info_platform_interface.dart
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.9
+
 import 'dart:async';
 
 import 'package:plugin_platform_interface/plugin_platform_interface.dart';
diff --git a/packages/device_info/device_info_platform_interface/pubspec.yaml b/packages/device_info/device_info_platform_interface/pubspec.yaml
index 656e5b24c373..55bea2b1756f 100644
--- a/packages/device_info/device_info_platform_interface/pubspec.yaml
+++ b/packages/device_info/device_info_platform_interface/pubspec.yaml
@@ -3,7 +3,7 @@ description: A common platform interface for the device_info plugin.
 homepage: https://github.com/flutter/plugins/tree/master/packages/device_info
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 1.0.1
+version: 1.0.2
 
 dependencies:
   flutter:
diff --git a/packages/plugin_platform_interface/CHANGELOG.md b/packages/plugin_platform_interface/CHANGELOG.md
index 01b5ff7d1252..f26cb7354e33 100644
--- a/packages/plugin_platform_interface/CHANGELOG.md
+++ b/packages/plugin_platform_interface/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.4
+
+* Opt out of null safety.
+
 ## 1.0.3
 
 * Fix homepage in `pubspec.yaml`.
diff --git a/packages/plugin_platform_interface/lib/plugin_platform_interface.dart b/packages/plugin_platform_interface/lib/plugin_platform_interface.dart
index be4871928686..6cca16ba0c2d 100644
--- a/packages/plugin_platform_interface/lib/plugin_platform_interface.dart
+++ b/packages/plugin_platform_interface/lib/plugin_platform_interface.dart
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.9
+
 library plugin_platform_interface;
 
 import 'package:meta/meta.dart';
diff --git a/packages/plugin_platform_interface/pubspec.yaml b/packages/plugin_platform_interface/pubspec.yaml
index ae11b144ca8c..e39b9471e520 100644
--- a/packages/plugin_platform_interface/pubspec.yaml
+++ b/packages/plugin_platform_interface/pubspec.yaml
@@ -12,7 +12,7 @@ description: Reusable base class for Flutter plugin platform interfaces.
 # be done when absolutely necessary and after the ecosystem has already migrated to 1.X.Y version
 # that is forward compatible with 2.0.0 (ideally the ecosystem have migrated to depend on:
 # `plugin_platform_interface: >=1.X.Y <3.0.0`).
-version: 1.0.3
+version: 1.0.4
 
 repository: https://github.com/flutter/plugins/tree/master/packages/plugin_platform_interface
 
diff --git a/packages/url_launcher/url_launcher/CHANGELOG.md b/packages/url_launcher/url_launcher/CHANGELOG.md
index 34b9dbf7913a..5558c2683e38 100644
--- a/packages/url_launcher/url_launcher/CHANGELOG.md
+++ b/packages/url_launcher/url_launcher/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 5.7.10
+
+* Opt out of null safety.
+
 ## 5.7.9
 
 * Check in windows/ directory for example/
diff --git a/packages/url_launcher/url_launcher/lib/url_launcher.dart b/packages/url_launcher/url_launcher/lib/url_launcher.dart
index 25aa623a590f..ab5d56b96bfd 100644
--- a/packages/url_launcher/url_launcher/lib/url_launcher.dart
+++ b/packages/url_launcher/url_launcher/lib/url_launcher.dart
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.9
+
 import 'dart:async';
 
 import 'package:flutter/foundation.dart';
diff --git a/packages/url_launcher/url_launcher/pubspec.yaml b/packages/url_launcher/url_launcher/pubspec.yaml
index 9299086a9046..7fa97388ef91 100644
--- a/packages/url_launcher/url_launcher/pubspec.yaml
+++ b/packages/url_launcher/url_launcher/pubspec.yaml
@@ -2,7 +2,7 @@ name: url_launcher
 description: Flutter plugin for launching a URL on Android and iOS. Supports
   web, phone, SMS, and email schemes.
 homepage: https://github.com/flutter/plugins/tree/master/packages/url_launcher/url_launcher
-version: 5.7.9
+version: 5.7.10
 
 flutter:
   plugin:
diff --git a/packages/video_player/video_player/CHANGELOG.md b/packages/video_player/video_player/CHANGELOG.md
index e02bd76aa818..0186d4212241 100644
--- a/packages/video_player/video_player/CHANGELOG.md
+++ b/packages/video_player/video_player/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.11.1+5
+
+* Opt out of null safety.
+
 ## 0.11.1+4
 
 * Add `toString()` to `Caption`.
diff --git a/packages/video_player/video_player/lib/video_player.dart b/packages/video_player/video_player/lib/video_player.dart
index ac1645085e36..57003de2fb4f 100644
--- a/packages/video_player/video_player/lib/video_player.dart
+++ b/packages/video_player/video_player/lib/video_player.dart
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.9
+
 import 'dart:async';
 import 'dart:io';
 
diff --git a/packages/video_player/video_player/pubspec.yaml b/packages/video_player/video_player/pubspec.yaml
index 8234fee272e3..c12df3fe1194 100644
--- a/packages/video_player/video_player/pubspec.yaml
+++ b/packages/video_player/video_player/pubspec.yaml
@@ -4,7 +4,7 @@ description: Flutter plugin for displaying inline video with other Flutter
 # 0.10.y+z is compatible with 1.0.0, if you land a breaking change bump
 # the version to 2.0.0.
 # See more details: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0
-version: 0.11.1+4
+version: 0.11.1+5
 homepage: https://github.com/flutter/plugins/tree/master/packages/video_player/video_player
 
 flutter:
diff --git a/packages/video_player/video_player_platform_interface/CHANGELOG.md b/packages/video_player/video_player_platform_interface/CHANGELOG.md
index 8af22f783675..dda460b4ceca 100644
--- a/packages/video_player/video_player_platform_interface/CHANGELOG.md
+++ b/packages/video_player/video_player_platform_interface/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 2.2.1
+
+* Opt out of null safety.
+
 ## 2.2.0
 
 * Added option to set the video playback speed on the video controller.
diff --git a/packages/video_player/video_player_platform_interface/lib/video_player_platform_interface.dart b/packages/video_player/video_player_platform_interface/lib/video_player_platform_interface.dart
index 2757fb135af6..eca37cfba30c 100644
--- a/packages/video_player/video_player_platform_interface/lib/video_player_platform_interface.dart
+++ b/packages/video_player/video_player_platform_interface/lib/video_player_platform_interface.dart
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// @dart = 2.9
+
 import 'dart:async';
 import 'dart:ui';
 
diff --git a/packages/video_player/video_player_platform_interface/pubspec.yaml b/packages/video_player/video_player_platform_interface/pubspec.yaml
index cc3cd79f1f33..405d3dd3e0a7 100644
--- a/packages/video_player/video_player_platform_interface/pubspec.yaml
+++ b/packages/video_player/video_player_platform_interface/pubspec.yaml
@@ -3,7 +3,7 @@ description: A common platform interface for the video_player plugin.
 homepage: https://github.com/flutter/plugins/tree/master/packages/video_player/video_player_platform_interface
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 2.2.0
+version: 2.2.1
 
 dependencies:
   flutter:
diff --git a/packages/video_player/video_player_web/CHANGELOG.md b/packages/video_player/video_player_web/CHANGELOG.md
index d18504913d89..08c66271185a 100644
--- a/packages/video_player/video_player_web/CHANGELOG.md
+++ b/packages/video_player/video_player_web/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.1.5
+
+* Out out of null safety.
+
 ## 0.1.4
 
 * Added option to set the video playback speed on the video controller.
diff --git a/packages/video_player/video_player_web/lib/video_player_web.dart b/packages/video_player/video_player_web/lib/video_player_web.dart
index 251da3779e7f..6327e6ffaa6d 100644
--- a/packages/video_player/video_player_web/lib/video_player_web.dart
+++ b/packages/video_player/video_player_web/lib/video_player_web.dart
@@ -1,3 +1,9 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// @dart = 2.9
+
 import 'dart:async';
 import 'dart:html';
 import 'dart:ui' as ui;
diff --git a/packages/video_player/video_player_web/pubspec.yaml b/packages/video_player/video_player_web/pubspec.yaml
index 98191bf6ba85..d49fe06dd195 100644
--- a/packages/video_player/video_player_web/pubspec.yaml
+++ b/packages/video_player/video_player_web/pubspec.yaml
@@ -4,7 +4,7 @@ homepage: https://github.com/flutter/plugins/tree/master/packages/video_player/v
 # 0.1.y+z is compatible with 1.0.0, if you land a breaking change bump
 # the version to 2.0.0.
 # See more details: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0
-version: 0.1.4
+version: 0.1.5
 
 flutter:
   plugin: