diff --git a/CHANGELOG.md b/CHANGELOG.md
index 65aed82..dcd317f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,7 @@
-#### Pub version 0.9.0-dev
+#### Pub version 0.9.0+1
+  * Remove all `.map` and `.concat.js` files during release mode.
+
+#### Pub version 0.9.0
   * Updated to platform version 0.4.2, internally a deprecated API was removed,
     hence the bump in the version number.
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 98b2d7f..4e6872b 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: web_components
-version: 0.9.0
+version: 0.9.0+1
 author: Polymer.dart Authors <web-ui-dev@dartlang.org>
 homepage: https://www.dartlang.org/polymer-dart/
 description: >
@@ -11,3 +11,16 @@
   bundle code and HTML as if they were libraries.
 environment:
   sdk: ">=1.4.0-dev.6.6 <2.0.0"
+dependencies:
+  code_transformers: ">=0.2.2 <0.3.0"
+transformers:
+# TODO(sigmund): once we have some easier way to do global app-level
+# transformers, we might want to remove this transformer here and only apply it
+# in apps that need it.
+- code_transformers/src/delete_file:
+    $include:
+      - lib/platform.concat.js
+      - lib/platform.concat.js.map
+      - lib/platform.js.map
+- code_transformers/src/remove_sourcemap_comment:
+    $include: lib/platform.js