diff --git a/.travis.yml b/.travis.yml
index 52552b3ceb..73fe4b80d0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,12 +7,15 @@ android:
   components:
   - platform-tools
   - tools
-  - build-tools-26.0.2
+  - build-tools-27.0.2
   - android-23
   - extra-google-m2repository
   - extra-android-m2repository
   - extra-google-google_play_services
   
+before_install:
+- yes | sdkmanager "platforms;android-27"
+
 script:
   # Unit Test
   - ./gradlew test jacocoTestReport
diff --git a/app/build.gradle b/app/build.gradle
index 6ecea2b3e1..054808a454 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -12,9 +12,10 @@ buildscript {
 apply plugin: "com.android.application"
 apply plugin: "io.fabric"
 apply plugin: "jacoco-android"
+apply plugin: 'com.jakewharton.butterknife'
 
 ext {
-    supportLibraryVersion = "23.4.0"
+    supportLibraryVersion = "27.0.2"
     ormLiteVersion = "4.46"
     powermockVersion = "1.7.3"
     dexmakerVersion = "1.2"
@@ -47,8 +48,8 @@ def generateGitBuild = { ->
 }
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "26.0.2"
+    compileSdkVersion 27
+    buildToolsVersion "${supportLibraryVersion}"
 
     defaultConfig {
         applicationId "info.nightscout.androidaps"
@@ -204,6 +205,9 @@ dependencies {
 
     compile "net.danlew:android.joda:2.9.9.1"
 
+    api "com.jakewharton:butterknife:8.8.1"
+    annotationProcessor "com.jakewharton:butterknife-compiler:8.8.1"
+
     testCompile "junit:junit:4.12"
     testCompile "org.json:json:20140107"
     testCompile "org.mockito:mockito-core:2.7.22"
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/Loop/LoopPlugin.java b/app/src/main/java/info/nightscout/androidaps/plugins/Loop/LoopPlugin.java
index 539b9991a3..b2d79f4b7e 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/Loop/LoopPlugin.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/Loop/LoopPlugin.java
@@ -6,7 +6,7 @@ import android.app.PendingIntent;
 import android.app.TaskStackBuilder;
 import android.content.Context;
 import android.content.Intent;
-import android.support.v7.app.NotificationCompat;
+import android.support.v4.app.NotificationCompat;
 
 import com.crashlytics.android.answers.Answers;
 import com.crashlytics.android.answers.CustomEvent;
diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/Persistentnotification/PersistentNotificationPlugin.java b/app/src/main/java/info/nightscout/androidaps/plugins/Persistentnotification/PersistentNotificationPlugin.java
index 9e631def18..558d01b94d 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/Persistentnotification/PersistentNotificationPlugin.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/Persistentnotification/PersistentNotificationPlugin.java
@@ -7,7 +7,7 @@ import android.content.Intent;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.support.v4.app.TaskStackBuilder;
-import android.support.v7.app.NotificationCompat;
+import android.support.v4.app.NotificationCompat;
 
 import com.squareup.otto.Subscribe;
 
diff --git a/build.gradle b/build.gradle
index c068560ec2..e13cb27485 100644
--- a/build.gradle
+++ b/build.gradle
@@ -10,12 +10,17 @@ buildscript {
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
+
+        classpath 'com.jakewharton:butterknife-gradle-plugin:8.4.0'
     }
 }
 
 allprojects {
     repositories {
         jcenter()
+        maven {
+            url "https://maven.google.com"
+        }
     }
 }