diff --git a/.travis.yml b/.travis.yml
index 28ee533d..3558ddb5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -28,6 +28,7 @@ android:
     components:
         - tools
         - build-tools-24.0.1
+        - extra-android-m2repository
         - extra-google-m2repository
 
 install:
diff --git a/README.md b/README.md
index ed4d8bb1..69352d21 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ A [shadowsocks](http://shadowsocks.org) client for Android, written in Scala.
 * Go 1.4+
 * Android SDK
   - Build Tools 24+ (as required by [`sbt-android`](https://github.com/scala-android/sbt-android))
-  - Google Repository (see `build.sbt` for version)
+  - Android Support Repository and Google Repository (see `build.sbt` for version)
 * Android NDK r12b+
 
 ### BUILD