diff --git a/build.gradle b/build.gradle
index 8872a11b..1678a9e4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,13 +4,13 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.2'
+        classpath 'com.android.tools.build:gradle:3.2.0'
     }
 }
 
 ext {
-    compileSdkVersion = 27
-    buildToolsVersion = "27.0.3"
+    compileSdkVersion = 28
+    buildToolsVersion = "28.0.3"
 }
 
 allprojects {
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index adcba380..7d86125e 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Tue Apr 17 10:55:33 WIB 2018
+#Wed Oct 03 13:18:07 WIB 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip
diff --git a/library/build.gradle b/library/build.gradle
index bd92acc5..0da8f484 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -8,13 +8,13 @@ android {
     buildToolsVersion rootProject.ext.buildToolsVersion
 
     defaultConfig {
-        minSdkVersion 9
+        minSdkVersion 14
     }
 
     lintOptions {
         abortOnError false
     }
-    buildToolsVersion '27.0.3'
+    buildToolsVersion '28.0.3'
 }
 
 dependencies {
diff --git a/sample/build.gradle b/sample/build.gradle
index f9fcb950..919895d5 100644
--- a/sample/build.gradle
+++ b/sample/build.gradle
@@ -8,8 +8,8 @@ android {
     buildToolsVersion rootProject.ext.buildToolsVersion
 
     defaultConfig {
-        minSdkVersion 9
-        targetSdkVersion 27
+        minSdkVersion 14
+        targetSdkVersion 28
     }
 
     lintOptions {
@@ -23,7 +23,7 @@ android {
             shrinkResources true
         }
     }
-    buildToolsVersion '27.0.3'
+    buildToolsVersion '28.0.3'
 }
 
 dependencies {