diff --git a/app/build.gradle b/app/build.gradle
index 534e302..29fc784 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,8 +1,8 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 25
-    buildToolsVersion "25.0.2"
+    compileSdkVersion 26
+    buildToolsVersion "26.0.2"
 
     defaultConfig {
         applicationId "net.ossrs.yasea.demo"
@@ -25,6 +25,6 @@ android {
 dependencies {
     compile fileTree(dir: 'libx264.libs', include: ['*.jar'])
     testCompile 'junit:junit:4.12'
-    compile 'com.android.support:appcompat-v7:25.3.1'
+    compile 'com.android.support:appcompat-v7:26.1.0'
     compile project(path: ':library')
 }
diff --git a/build.gradle b/build.gradle
index 6514a0b..610ad07 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,9 +3,10 @@
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.3'
+        classpath 'com.android.tools.build:gradle:3.0.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
@@ -15,6 +16,7 @@ buildscript {
 allprojects {
     repositories {
         jcenter()
+        google()
     }
 }
 
diff --git a/library/build.gradle b/library/build.gradle
index cd002c6..29646ce 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -1,8 +1,8 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 25
-    buildToolsVersion "25.0.2"
+    compileSdkVersion 26
+    buildToolsVersion "26.0.2"
 
     defaultConfig {
         minSdkVersion 16
@@ -33,6 +33,6 @@ dependencies {
     androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
-    compile 'com.android.support:appcompat-v7:25.3.1'
+    compile 'com.android.support:appcompat-v7:26.1.0'
     testCompile 'junit:junit:4.12'
 }