diff --git a/CHANGELOG.md b/CHANGELOG.md
index f64292d5b3..17a0cca6cc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 ### Enhancements
 
+- Android 9.0 is now supported.
 - The OAuth2 unit now supports state tokens. Thanks @quangola!
 - [STFService.apk](https://github.com/openstf/STFService.apk) can now display the identity activity (red screen) automatically if a device gets disconnected from USB (or ADB), which can make maintenance easier. This feature is in beta, please enable it by running `adb shell pm grant jp.co.cyberagent.stf android.permission.DUMP` on the devices you want to try it on. Thanks @Malinskiy!
 
diff --git a/README.md b/README.md
index 58f933e433..0563e6890b 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ Please [contact us][contact-link] for sponsor arrangements. Both recurring and o
 
 * OS support
   - Android
-    * Supports versions 2.3.3 (SDK level 10) to 8.1 (SDK level 27)
+    * Supports versions 2.3.3 (SDK level 10) to 9.0 (SDK level 28)
     * Supports Wear 5.1 (but not 5.0 due to missing permissions)
     * Supports Fire OS, CyanogenMod, and other heavily Android based distributions
     * `root` is **not** required for any current functionality