diff --git a/app/build.gradle b/app/build.gradle
index 35b2f51..d7650c0 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,7 +1,7 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 25
+    compileSdkVersion rootProject.ext.compileSdkVersion
     buildToolsVersion rootProject.ext.buildToolsVersion
 
     defaultConfig {
@@ -24,9 +24,9 @@ android {
 }
 
 dependencies {
-    compile fileTree(include: ['*.jar'], dir: 'libs')
-    testCompile 'junit:junit:4.12'
-    compile project(':libk-switchbutton')
+    implementation fileTree(include: ['*.jar'], dir: 'libs')
+    testImplementation 'junit:junit:4.12'
+    implementation project(':libk-switchbutton')
 //    compile 'lib.kingja.switchbutton:switchbutton:1.1.6'
-    compile "com.android.support:appcompat-v7:$rootProject.ext.supportVersion"
+    implementation "com.android.support:appcompat-v7:$rootProject.ext.supportVersion"
 }
diff --git a/app/src/main/java/com/kingja/switchbutton/MainActivity.java b/app/src/main/java/com/kingja/switchbutton/MainActivity.java
index 849b3a6..fb4d808 100644
--- a/app/src/main/java/com/kingja/switchbutton/MainActivity.java
+++ b/app/src/main/java/com/kingja/switchbutton/MainActivity.java
@@ -17,6 +17,7 @@
 
 package com.kingja.switchbutton;
 
+import android.graphics.Typeface;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
 import android.widget.Toast;
@@ -43,8 +44,8 @@ public class MainActivity extends AppCompatActivity {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
-
-        ((SwitchMultiButton) findViewById(R.id.switchmultibutton1)).setText(tabTexts1).setOnSwitchListener(onSwitchListener);
+        Typeface typeface = Typeface.createFromAsset(getAssets(), "fonts/tielanti.ttf");
+        ((SwitchMultiButton) findViewById(R.id.switchmultibutton1)).setText(tabTexts1).setOnSwitchListener(onSwitchListener).setTypeface(typeface);
         ((SwitchMultiButton) findViewById(R.id.switchmultibutton2)).setText("点个Star", "狠心拒绝").setOnSwitchListener(onSwitchListener);
         ((SwitchMultiButton) findViewById(switchmultibutton3)).setOnSwitchListener(onSwitchListener).setSelectedTab(1);
         ((SwitchMultiButton) findViewById(R.id.switchmultibutton4)).setText(tabTexts4).setOnSwitchListener(onSwitchListener);
diff --git a/build.gradle b/build.gradle
index eb1fe92..53b376d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,15 +3,17 @@ apply from:'config.gradle'
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.3'
+        classpath 'com.android.tools.build:gradle:3.1.3'
     }
 }
 
 allprojects {
     repositories {
         jcenter()
+        google()
     }
 }
 
diff --git a/config.gradle b/config.gradle
index bec55a9..af309cf 100644
--- a/config.gradle
+++ b/config.gradle
@@ -1,10 +1,10 @@
 ext {
-    compileSdkVersion = 25
-    buildToolsVersion = "25.0.3"
+    compileSdkVersion = 27
+    buildToolsVersion = "27.0.3"
     minSdkVersion = 14
-    targetSdkVersion = 25
+    targetSdkVersion = 27
     versionCode = 5
     versionName = "1.1.5"
 
-    supportVersion = '25.3.1'
+    supportVersion = '27.1.1'
 }
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index aedaf6f..69aadc3 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Sun Jul 09 18:58:12 CST 2017
+#Mon Jul 30 19:31:53 IRDT 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip
diff --git a/libk-switchbutton/build.gradle b/libk-switchbutton/build.gradle
index 043dd79..2a88013 100644
--- a/libk-switchbutton/build.gradle
+++ b/libk-switchbutton/build.gradle
@@ -18,7 +18,7 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    testCompile 'junit:junit:4.12'
-    compile "com.android.support:appcompat-v7:$rootProject.ext.supportVersion"
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    testImplementation 'junit:junit:4.12'
+    implementation "com.android.support:appcompat-v7:$rootProject.ext.supportVersion"
 }
diff --git a/libk-switchbutton/src/main/java/lib/kingja/switchbutton/SwitchMultiButton.java b/libk-switchbutton/src/main/java/lib/kingja/switchbutton/SwitchMultiButton.java
index d939c37..411fee9 100644
--- a/libk-switchbutton/src/main/java/lib/kingja/switchbutton/SwitchMultiButton.java
+++ b/libk-switchbutton/src/main/java/lib/kingja/switchbutton/SwitchMultiButton.java
@@ -395,6 +395,18 @@ public SwitchMultiButton setText(String... tagTexts) {
             throw new IllegalArgumentException("the size of tagTexts should greater then 1");
         }
     }
+
+    /**
+     * set Typeface for buttons from java code
+     *
+     * @param typeface
+     */
+    public void setTypeface(Typeface typeface) {
+        this.typeface = typeface;
+        mSelectedTextPaint.setTypeface(typeface);
+        mUnselectedTextPaint.setTypeface(typeface);
+        invalidate();
+    }
     /*======================================save and restore======================================*/
 
     @Override