diff --git a/build.gradle b/build.gradle
index 2729fb1d..26121dc1 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,7 +4,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.1.0'
+        classpath 'com.android.tools.build:gradle:1.3.0'
     }
 }
 
@@ -17,21 +17,15 @@ allprojects {
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 22
+    compileSdkVersion 23
     buildToolsVersion "22.0.1"
 
     defaultConfig {
         applicationId "ch.blinkenlights.android.vanilla"
         minSdkVersion 15
-        targetSdkVersion 22
+        targetSdkVersion 23
     }
 
-    compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_5
-        targetCompatibility JavaVersion.VERSION_1_5
-    }
-
-
     sourceSets {
         main {
             manifest.srcFile 'AndroidManifest.xml'
diff --git a/src/ch/blinkenlights/android/vanilla/PermissionRequestActivity.java b/src/ch/blinkenlights/android/vanilla/PermissionRequestActivity.java
index 77e22acc..80307e53 100644
--- a/src/ch/blinkenlights/android/vanilla/PermissionRequestActivity.java
+++ b/src/ch/blinkenlights/android/vanilla/PermissionRequestActivity.java
@@ -19,6 +19,7 @@ package ch.blinkenlights.android.vanilla;
 
 
 import android.Manifest;
+import android.annotation.TargetApi;
 import android.app.Activity;
 import android.content.pm.PackageManager;
 import android.content.Context;
@@ -32,6 +33,7 @@ public class PermissionRequestActivity extends Activity {
 	// 'dangerous' permissions not granted by the manifest on versions >= M
 	private static final String[] NEEDED_PERMISSIONS = { Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE };
 
+	@TargetApi(Build.VERSION_CODES.M)
 	@Override
 	public void onCreate(Bundle savedInstanceState) {
 		ThemeHelper.setTheme(this, R.style.VanillaBase);