diff --git a/app/build.gradle b/app/build.gradle
index 7a9abb46e5..080422af46 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -16,9 +16,11 @@ apply plugin: 'com.jakewharton.butterknife'
 
 ext {
     supportLibraryVersion = "27.0.2"
+    sdkBuildVersion = "27.0.3"
     ormLiteVersion = "4.46"
     powermockVersion = "1.7.3"
     dexmakerVersion = "1.2"
+    butterknifeVersion = "8.8.1"
 }
 
 
@@ -55,7 +57,7 @@ tasks.matching {it instanceof Test}.all {
 
 android {
     compileSdkVersion 27
-    buildToolsVersion "${supportLibraryVersion}"
+    buildToolsVersion "${sdkBuildVersion}"
 
     defaultConfig {
         applicationId "info.nightscout.androidaps"
@@ -221,8 +223,8 @@ dependencies {
 
     implementation 'org.mozilla:rhino:1.7.7.2'
 
-    api "com.jakewharton:butterknife:8.8.1"
-    annotationProcessor "com.jakewharton:butterknife-compiler:8.8.1"
+    implementation "com.jakewharton:butterknife:${butterknifeVersion}"
+    annotationProcessor "com.jakewharton:butterknife-compiler:${butterknifeVersion}"
 
     testImplementation "junit:junit:4.12"
     testImplementation "org.json:json:20140107"
diff --git a/build.gradle b/build.gradle
index 0bbe15c8a2..7cfd0f7ea4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,14 +4,15 @@ buildscript {
     repositories {
         jcenter()
         google()
+        maven { url "https://oss.sonatype.org/content/repositories/snapshots/" }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.1'
+        classpath 'com.android.tools.build:gradle:3.1.0'
 
         // 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'
+        classpath 'com.jakewharton:butterknife-gradle-plugin:9.0.0-SNAPSHOT'
     }
 }
 
diff --git a/wear/build.gradle b/wear/build.gradle
index 1640819c3f..e842aae62f 100644
--- a/wear/build.gradle
+++ b/wear/build.gradle
@@ -28,7 +28,7 @@ def generateGitBuild = { ->
 
 android {
     compileSdkVersion 23
-    buildToolsVersion "26.0.2"
+    buildToolsVersion "27.0.3"
 
     defaultConfig {
         applicationId "info.nightscout.androidaps"