diff --git a/build_runner/CHANGELOG.md b/build_runner/CHANGELOG.md
index 732ce6d31..ced797daf 100644
--- a/build_runner/CHANGELOG.md
+++ b/build_runner/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 2.3.2
+
+- Add supported platforms to pubspec.
+
 ## 2.3.1
 
 - Upgrade to `frontend_service_client` version 3.
diff --git a/build_runner/pubspec.yaml b/build_runner/pubspec.yaml
index f3e014fa2..9e9799d19 100644
--- a/build_runner/pubspec.yaml
+++ b/build_runner/pubspec.yaml
@@ -1,11 +1,16 @@
 name: build_runner
-version: 2.3.1
+version: 2.3.2
 description: A build system for Dart code generation and modular compilation.
 repository: https://github.com/dart-lang/build/tree/master/build_runner
 
 environment:
   sdk: ">=2.14.0 <3.0.0"
 
+platforms:
+  linux:
+  windows:
+  macos:
+
 dependencies:
   args: ^2.0.0
   async: ^2.5.0
diff --git a/build_runner_core/CHANGELOG.md b/build_runner_core/CHANGELOG.md
index 48f835efa..a858da333 100644
--- a/build_runner_core/CHANGELOG.md
+++ b/build_runner_core/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 7.2.6
+
+- Add supported platforms to pubspec.
+
 ## 7.2.5
 
 - Expand pubspec description.
diff --git a/build_runner_core/pubspec.yaml b/build_runner_core/pubspec.yaml
index 8a568587b..39460740e 100644
--- a/build_runner_core/pubspec.yaml
+++ b/build_runner_core/pubspec.yaml
@@ -1,11 +1,16 @@
 name: build_runner_core
-version: 7.2.5
+version: 7.2.6
 description: Core tools to organize the structure of a build and run Builders.
 repository: https://github.com/dart-lang/build/tree/master/build_runner_core
 
 environment:
   sdk: ">=2.17.0 <3.0.0"
 
+platforms:
+  linux:
+  windows:
+  macos:
+
 dependencies:
   async: ^2.5.0
   build: ^2.1.0