diff --git a/graphenej/build.gradle b/graphenej/build.gradle
index 933626d..c5cded5 100644
--- a/graphenej/build.gradle
+++ b/graphenej/build.gradle
@@ -5,12 +5,11 @@ apply plugin: 'com.android.library'
 //apply from: 'maven-push.gradle'
 
 android {
-    compileSdkVersion 24
-    buildToolsVersion '28.0.3'
+    compileSdkVersion 28
 
     defaultConfig {
         minSdkVersion 14
-        targetSdkVersion 24
+        targetSdkVersion 28
         versionCode 12
         versionName "0.4.7-alpha3"
         vectorDrawables.useSupportLibrary = true