diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9d590313beaf709d8f2a020690f1530124d40b56..f280ae491c9fdfb81a2be8072f6f08c986c5238f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.12.13+6
+
+* Declare support for version 1.18 of the Dart SDK.
+
 ## 0.12.13+5
 
 * Use the latest `collection` package.
diff --git a/pubspec.yaml b/pubspec.yaml
index 039fdb504de99a977b617b31f635fbd7b0fdfee3..5679b5491a1f8f0887700b56e76c470f84ff4df5 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,10 +1,10 @@
 name: test
-version: 0.12.14-dev
+version: 0.12.13+6
 author: Dart Team <misc@dartlang.org>
 description: A library for writing dart unit tests.
 homepage: https://github.com/dart-lang/test
 environment:
-  sdk: '>=1.13.0 <1.18.0'
+  sdk: '>=1.13.0 <1.19.0'
 dependencies:
   analyzer: '>=0.23.0 <0.28.0'
   args: '^0.13.1'