diff --git a/build.gradle b/build.gradle
index ec6b0e4..3ba34b2 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,10 +2,14 @@
 buildscript {
     repositories {
         jcenter()
+        maven {
+            url 'https://maven.google.com/'
+            name 'Google'
+        }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.0.0'
-        classpath 'com.novoda:bintray-release:0.3.4'
+        classpath 'com.android.tools.build:gradle:2.3.3'
+        classpath 'com.novoda:bintray-release:0.4.0'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }
@@ -14,6 +18,10 @@ buildscript {
 allprojects {
     repositories {
         jcenter()
+        maven {
+            url 'https://maven.google.com/'
+            name 'Google'
+        }
     }
 }
 
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index b9d2f8b..e5326f3 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Thu Apr 14 15:31:39 CST 2016
+#Wed Sep 13 09:24:30 CST 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.10-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
diff --git a/library/build.gradle b/library/build.gradle
index 3b27449..42ac65f 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -2,12 +2,12 @@ apply plugin: 'com.android.library'
 apply plugin: 'com.novoda.bintray-release'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.3"
+    compileSdkVersion 26
+    buildToolsVersion "26.0.1"
 
     defaultConfig {
         minSdkVersion 15
-        targetSdkVersion 23
+        targetSdkVersion 26
         versionCode VERSION_CODE as int
         versionName VERSION_NAME
     }
@@ -20,7 +20,7 @@ android {
 }
 
 dependencies {
-    compile 'com.google.code.gson:gson:2.7'
+    provided 'com.google.code.gson:gson:2.8.1'
 }
 
 publish {
@@ -35,4 +35,4 @@ publish {
     repository = POM_SCM_URL
     autoPublish = false
     dryRun = false
-}
\ No newline at end of file
+}
diff --git a/sample/build.gradle b/sample/build.gradle
index 6fe69f3..2bde538 100644
--- a/sample/build.gradle
+++ b/sample/build.gradle
@@ -1,13 +1,13 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.3"
+    compileSdkVersion 26
+    buildToolsVersion "26.0.1"
 
     defaultConfig {
         applicationId "com.shawnlin.sample"
         minSdkVersion 15
-        targetSdkVersion 23
+        targetSdkVersion 26
         versionCode 1
         versionName "1.0"
     }
@@ -21,7 +21,8 @@ android {
 
 dependencies {
     compile fileTree(include: ['*.jar'], dir: 'libs')
-    compile 'com.android.support:appcompat-v7:23.2.1'
-    compile 'com.android.support:design:23.2.1'
+    compile 'com.android.support:appcompat-v7:26.0.2'
+    compile 'com.android.support:design:26.0.2'
+    compile 'com.google.code.gson:gson:2.8.1'
     compile project(':library')
 }