diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 92035e2..dbdf638 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,6 +1,6 @@
 {
   "base": "1.1.5",
-  "backends/chromecast": "1.2.0",
+  "backends/chromecast": "1.3.0",
   "backends/chromeos": "1.0.2",
   "backends/tizen": "1.1.4",
   "backends/xboxone": "1.0.4"
diff --git a/backends/chromecast/CHANGELOG.md b/backends/chromecast/CHANGELOG.md
index e95e871..6d062e9 100644
--- a/backends/chromecast/CHANGELOG.md
+++ b/backends/chromecast/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.3.0](https://github.com/shaka-project/generic-webdriver-server/compare/chromecast-webdriver-server-v1.2.0...chromecast-webdriver-server-v1.3.0) (2024-05-08)
+
+
+### Features
+
+* **chromecast:** Allow async access to `cast.__platform__` via postMessage ([#84](https://github.com/shaka-project/generic-webdriver-server/issues/84)) ([8475479](https://github.com/shaka-project/generic-webdriver-server/commit/8475479f665c182b9beb184ceffd46bddcc6f052))
+
 ## [1.2.0](https://github.com/shaka-project/generic-webdriver-server/compare/chromecast-webdriver-server-v1.1.1...chromecast-webdriver-server-v1.2.0) (2023-09-15)
 
 
diff --git a/backends/chromecast/package-lock.json b/backends/chromecast/package-lock.json
index c22c336..3cef9a3 100644
--- a/backends/chromecast/package-lock.json
+++ b/backends/chromecast/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "chromecast-webdriver-server",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "chromecast-webdriver-server",
-      "version": "1.2.0",
+      "version": "1.3.0",
       "license": "Apache-2.0",
       "workspaces": [
         "../../base"
diff --git a/backends/chromecast/package.json b/backends/chromecast/package.json
index 75f376e..6b6ad08 100644
--- a/backends/chromecast/package.json
+++ b/backends/chromecast/package.json
@@ -1,7 +1,7 @@
 {
   "name": "chromecast-webdriver-server",
   "description": "A WebDriver server that pushes URLs to Chromecast, built on generic-webdriver-server.",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "homepage": "https://github.com/shaka-project/generic-webdriver-server",
   "author": "Google",
   "license": "Apache-2.0",