[connectivity_macos] null safety
diff --git a/packages/connectivity/connectivity_macos/CHANGELOG.md b/packages/connectivity/connectivity_macos/CHANGELOG.md
index f7c893e..9261b0e 100644
--- a/packages/connectivity/connectivity_macos/CHANGELOG.md
+++ b/packages/connectivity/connectivity_macos/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.2.0-nullsafety
+
+* Update Dart SDK constraint.
+
 ## 0.1.0+8
 
 * Update Flutter SDK constraint.
diff --git a/packages/connectivity/connectivity_macos/pubspec.yaml b/packages/connectivity/connectivity_macos/pubspec.yaml
index acd608f..dd193f7 100644
--- a/packages/connectivity/connectivity_macos/pubspec.yaml
+++ b/packages/connectivity/connectivity_macos/pubspec.yaml
@@ -3,7 +3,7 @@
 # 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: 0.1.0+8
+version: 0.2.0-nullsafety
 homepage: https://github.com/flutter/plugins/tree/master/packages/connectivity/connectivity_macos
 
 flutter:
@@ -13,7 +13,7 @@
         pluginClass: ConnectivityPlugin
 
 environment:
-  sdk: ">=2.1.0 <3.0.0"
+  sdk: ">=2.12.0-0 <3.0.0"
   flutter: ">=1.10.0"
 
 dependencies: