diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 9bada75..37f3003 100755
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -12,7 +12,7 @@
     <uses-permission android:name="android.permission.USE_CREDENTIALS"/>
 
     <application android:allowBackup="true" android:icon="@drawable/ic_launcher_guestbook" android:label="@string/app_name" android:theme="@style/AppTheme">
-        <meta-data android:name="com.google.android.gms.version" android:value="13" />
+        <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" />
         <activity android:configChanges="orientation|screenSize" android:label="@string/app_name" android:name="com.google.cloud.backend.sample.guestbook.GuestbookActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>