diff --git a/build.gradle b/build.gradle
index aa0072b..b0dd85d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,12 +4,13 @@ apply from: "config.gradle"
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.0'
+        classpath 'com.android.tools.build:gradle:3.1.3'
         classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
         classpath "io.realm:realm-gradle-plugin:3.1.1"
-
+        classpath 'com.jakewharton:butterknife-gradle-plugin:8.8.1'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }