diff --git a/beam/build.gradle b/beam/build.gradle
index c0c43fb..fec9de7 100644
--- a/beam/build.gradle
+++ b/beam/build.gradle
@@ -21,7 +21,7 @@ android {
 dependencies {
     compile fileTree(include: ['*.jar'], dir: 'libs')
     compile 'com.android.support:appcompat-v7:23.1.1'
-    compile 'com.jude:easyrecyclerview:3.4.8'
+    compile 'com.jude:easyrecyclerview:3.4.9'
     compile 'io.reactivex:rxandroid:1.0.1'
 }
 
@@ -36,7 +36,7 @@ ext {
     gitUrl = 'https://github.com/Jude95/RequestVolley'
 
 
-    libraryVersion = '2.8.2'//版本号
+    libraryVersion = '2.8.3'//版本号
     libraryName = 'beam'//项目名字，没什么用
     libraryDescription = 'A framwork for Android'//项目描述，没什么用
 
diff --git a/beam/src/main/java/com/jude/beam/expansion/list/BeamListActivityPresenter.java b/beam/src/main/java/com/jude/beam/expansion/list/BeamListActivityPresenter.java
index b23ea52..44a0cd0 100644
--- a/beam/src/main/java/com/jude/beam/expansion/list/BeamListActivityPresenter.java
+++ b/beam/src/main/java/com/jude/beam/expansion/list/BeamListActivityPresenter.java
@@ -2,6 +2,7 @@
 
 import android.content.Context;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.v4.widget.SwipeRefreshLayout;
 import android.view.ViewGroup;
 
@@ -47,7 +48,7 @@ public void onStart() {
     };
 
     @Override
-    protected void onCreate(T view, Bundle savedState) {
+    protected void onCreate(@NonNull T view, Bundle savedState) {
         super.onCreate(view, savedState);
 
     }
diff --git a/build.gradle b/build.gradle
index 97ac6bf..e13f452 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.5.0'
+        classpath 'com.android.tools.build:gradle:2.1.0-beta1'
         classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.4'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:1.3'
         // NOTE: Do not place your application dependencies here; they belong