diff --git a/README.md b/README.md
index ee8fa07..146b884 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ A library to make classic bluetooth or BLE easier to use in Android.
 
 ```groovy
 dependencies {
-    compile 'co.lujun:lmbluetoothsdk:1.0.2'
+    compile 'co.lujun:lmbluetoothsdk:1.0.4'
 }
 ```
 
@@ -26,7 +26,7 @@ dependencies {
 <dependency>
     <groupId>co.lujun</groupId>
     <artifactId>lmbluetoothsdk</artifactId>
-    <version>1.0.2</version>
+    <version>1.0.4</version>
     <packaging>aar</packaging>
 </dependency>
 ```
@@ -191,6 +191,9 @@ Manufacturing bluetooth connection status, there are 6 states in the class.
 | STATE_GOT_CHARACTERISTICS | 6 | got all characteristics
 
 ## Change logs
+###1.0.4(2017-2-6)
+- bug fix
+
 ###1.0.2(2016-3-15)
 - Add ```RSSI``` value for scan callback
 - Add ```STATE_GOT_CHARACTERISTICS``` state for got all characteristics
diff --git a/build.gradle b/build.gradle
index 8867406..a2a730e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,8 +5,8 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.2'
-        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.3'
+        classpath 'com.android.tools.build:gradle:2.2.2'
+        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.4.1'
         classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.0'
 
         // NOTE: Do not place your application dependencies here; they belong
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 1e887c5..bd17d6a 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Fri Aug 19 18:14:54 CDT 2016
+#Mon Feb 06 22:54:24 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-2.14.1-all.zip
diff --git a/lmbluetoothsdk/build.gradle b/lmbluetoothsdk/build.gradle
index 886b874..cb42de5 100755
--- a/lmbluetoothsdk/build.gradle
+++ b/lmbluetoothsdk/build.gradle
@@ -1,14 +1,14 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.3"
+    compileSdkVersion 25
+    buildToolsVersion "25.0.0"
 
     defaultConfig {
         minSdkVersion 9
         targetSdkVersion 23
-        versionCode 103
-        versionName "1.0.3"
+        versionCode 104
+        versionName "1.0.4"
     }
     buildTypes {
         release {