diff --git a/docs-android/app/build.gradle b/docs-android/app/build.gradle
index 1b86dd75..f5b2f334 100644
--- a/docs-android/app/build.gradle
+++ b/docs-android/app/build.gradle
@@ -3,7 +3,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.0-alpha3'
+        classpath 'com.android.tools.build:gradle:2.1.0-alpha4'
     }
 }
 apply plugin: 'com.android.application'