diff --git a/downloadutil/build.gradle b/downloadutil/build.gradle
index 2416ac97..ab3d8ef1 100644
--- a/downloadutil/build.gradle
+++ b/downloadutil/build.gradle
@@ -2,7 +2,7 @@ apply plugin: 'com.android.library'
 
 apply plugin: 'com.github.dcendents.android-maven'
 
-group='AriaLyy'
+group='com.github.AriaLyy'
 
 android {
   compileSdkVersion 23
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
deleted file mode 100644
index 13372aef..00000000
Binary files a/gradle/wrapper/gradle-wrapper.jar and /dev/null differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
deleted file mode 100644
index 35e28127..00000000
--- a/gradle/wrapper/gradle-wrapper.properties
+++ /dev/null
@@ -1,7 +0,0 @@
-#Mon Dec 28 10:00:20 PST 2015
-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
-org.gradle.jvmargs=-Xmx1024m