diff --git a/pkg/js/CHANGELOG.md b/pkg/js/CHANGELOG.md
index 05ef42f8027..a996ef1ac8a 100644
--- a/pkg/js/CHANGELOG.md
+++ b/pkg/js/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 0.6.3-dev
+## 0.6.3-nullsafety
 
 * Opt in to null safety.
 
diff --git a/pkg/js/pubspec.yaml b/pkg/js/pubspec.yaml
index 24616bf9f44..ddc5195d970 100644
--- a/pkg/js/pubspec.yaml
+++ b/pkg/js/pubspec.yaml
@@ -1,10 +1,10 @@
 name: js
-version: 0.6.3-dev
+version: 0.6.3-nullsafety
 description: Annotations to create static Dart interfaces for JavaScript APIs.
 homepage: https://github.com/dart-lang/sdk/tree/master/pkg/js
 
 environment:
-  sdk: '>=2.9.0-1 <3.0.0'
+  sdk: '>=2.9.0-18.0 <2.9.0'
 
 dev_dependencies:
   pedantic: ^1.9.0