diff --git a/recyclertreeview-lib/build.gradle b/recyclertreeview-lib/build.gradle
index ac459f5..4ec558e 100644
--- a/recyclertreeview-lib/build.gradle
+++ b/recyclertreeview-lib/build.gradle
@@ -1,13 +1,12 @@
 apply plugin: 'com.android.library'
-apply plugin: 'com.github.dcendents.android-maven'
-group='com.github.tellh'
+
 android {
-    compileSdkVersion 26
-    buildToolsVersion "26.0.2"
+    compileSdkVersion 28
+    buildToolsVersion "28.0.2"
 
     defaultConfig {
-        minSdkVersion 14
-        targetSdkVersion 26
+        minSdkVersion 21
+        targetSdkVersion 28
         versionCode 1
         versionName "1.0"
 
@@ -24,15 +23,8 @@ android {
 
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:appcompat-v7:26.1.0'
-    compile 'com.android.support:recyclerview-v7:26.1.0'
+    compile 'com.android.support:appcompat-v7:28.0.0'
+    compile 'com.android.support:recyclerview-v7:28.0.0'
 }
 
-tasks.withType(JavaCompile) {
-    options.encoding = "UTF-8"
-}
 
-task sourcesJar(type: Jar) {
-    from android.sourceSets.main.java.srcDirs
-    classifier = 'sources'
-}