diff --git a/.travis.yml b/.travis.yml
index 55d3d5f1..bdc01ceb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,8 +2,8 @@ language: android
 android:
   components:
     - platform-tools
-    - build-tools-26.0.0
-    - android-26
+    - build-tools-26.0.2
+    - android-27
     - extra-android-m2repository
 addons:
   sonarcloud:
diff --git a/Makefile b/Makefile
index d0c321f0..5543867b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 PACKAGE = de.markusfisch.android.binaryeye
-APK = app/build/outputs/apk/app-debug.apk
+APK = app/build/outputs/apk/debug/app-debug.apk
 
 all: debug install start
 
diff --git a/build.gradle b/build.gradle
index fe816bfb..ea8e9ca3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,12 +1,13 @@
 buildscript {
 	ext.kotlin_version = '1.1.51'
-	ext.tools_version = '2.3.3'
-	ext.build_tools_version = '26.0.0'
-	ext.sdk_version = 26
+	ext.tools_version = '3.0.0'
+	ext.build_tools_version = '26.0.2'
+	ext.sdk_version = 27
 	ext.support_version = '25.3.1'
 
 	repositories {
 		jcenter()
+		google()
 		mavenCentral()
 		maven {
 			url "https://plugins.gradle.org/m2/"
@@ -15,18 +16,19 @@ buildscript {
 
 	dependencies {
 		classpath "com.android.tools.build:gradle:$tools_version"
-		classpath 'net.ltgt.gradle:gradle-errorprone-plugin:0.0.8'
+		classpath 'net.ltgt.gradle:gradle-errorprone-plugin:0.0.10'
 		classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 	}
 }
 
 plugins {
-	id 'org.sonarqube' version '2.5'
+	id 'org.sonarqube' version '2.6'
 }
 
 allprojects {
 	repositories {
 		jcenter()
+		google()
 	}
 
 	gradle.projectsEvaluated {
diff --git a/cameraview/build.gradle b/cameraview/build.gradle
index 331db076..64fbfbb8 100644
--- a/cameraview/build.gradle
+++ b/cameraview/build.gradle
@@ -1,6 +1,7 @@
 buildscript {
 	repositories {
 		jcenter()
+		google()
 	}
 
 	dependencies {
@@ -21,6 +22,11 @@ android {
 		versionCode 5
 		versionName '1.3.0'
 	}
+
+	buildTypes {
+		debug
+		release
+	}
 }
 
 dependencies {
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index eaba3011..649480dd 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip