diff --git a/README.md b/README.md
index cb30fee..7f0cacb 100644
--- a/README.md
+++ b/README.md
@@ -88,9 +88,9 @@ allprojects {
 And add our dependency to your app `bundle.gradle`.
 
 ```gradle
-implementation 'com.devrapid.jieyi:kotlinknifer:2.0.5'
+implementation 'com.devrapid.jieyi:kotlinknifer:2.1.0'
 
-implementation 'com.devrapid.jieyi:kotlinshaver:1.0.5'
+implementation 'com.devrapid.jieyi:kotlinshaver:1.1.0'
 ```
 
 Then you can use it!!!
@@ -101,14 +101,14 @@ Then you can use it!!!
 <dependency>
   <groupId>com.devrapid.jieyi</groupId>
   <artifactId>kotlinknifer</artifactId>
-  <version>2.0.5</version>
+  <version>2.1.0</version>
   <type>pom</type>
 </dependency>
 
 <dependency>
   <groupId>com.devrapid.jieyi</groupId>
   <artifactId>kotlinshaver</artifactId>
-  <version>1.0.5</version>
+  <version>1.1.0</version>
   <type>pom</type>
 </dependency>
 ```
@@ -123,20 +123,20 @@ Then you can use it!!!
 ## kotlinshaver
 ### For Androidx
 
-1. RxJava 2.2.1
+1. RxJava 2.2.3
 2. RxKotlin 2.3.0
 
 If you'd not like to use them to your project, you can add the exclude as like below
 
 ```gradle
-implementation('com.devrapid.jieyi:kotlinknifer:2.0.5', {
+implementation('com.devrapid.jieyi:kotlinknifer:2.1.0', {
   exclude group: 'com.google.code.gson', module: 'gson'
   exclude group: 'com.github.bumptech.glide', module: 'glide'
 })
 ```
 
 ```gradle
-implementation('com.devrapid.jieyi:kotlinshaverr:1.0.5', {
+implementation('com.devrapid.jieyi:kotlinshaverr:1.1.0', {
   exclude group: 'io.reactivex.rxjava2', module: 'rxjava'
   exclude group: 'io.reactivex.rxjava2', module: 'rxkotlin'
 })
diff --git a/build.gradle b/build.gradle
index eb6c779..8f09f3c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,13 +1,15 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.2.61'
+    ext.kotlin_version = '1.3.0'
+    ext.kotlin_coroutine_version = '1.0.0'
     repositories {
         jcenter()
         google()
+        mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.2.0-beta04'
+        classpath 'com.android.tools.build:gradle:3.2.1'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/gradle.properties b/gradle.properties
index aaa86bb..55c1d3a 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -21,7 +21,7 @@ proj_name=kotlinknifer
 proj_libname=KotlinKnifer
 proj_group=com.devrapid.jieyi
 proj_artifactid=kotlinknifer
-proj_version=2.0.5
+proj_version=2.1.0
 proj_description=For developing an Android conveniently and rapidly.
 proj_websiteurl=https://github.com/pokk/KotlinKnifer
 proj_issuetrackerurl=https://github.com/pokk/KotlinKnifer/issues
@@ -39,4 +39,4 @@ developer_email=pokkbaby@gmail.com
 proj_kotlin_name=kotlinshaver
 proj_kotlin_libname=KotlinShaver
 proj_kotlin_artifactid=kotlinshaver
-proj_kotlin_version=1.0.5
+proj_kotlin_version=1.1.0
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index cf10787..47e406e 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.8-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip
diff --git a/kotlinknifer/build.gradle b/kotlinknifer/build.gradle
index 8d21ca8..88438e7 100644
--- a/kotlinknifer/build.gradle
+++ b/kotlinknifer/build.gradle
@@ -25,17 +25,17 @@ kotlin {
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
     // 'compile' can also import to the new project with this.
-    compile 'com.google.code.gson:gson:2.8.5'
-    compile 'com.github.bumptech.glide:glide:4.8.0'
+    compile "com.google.code.gson:gson:2.8.5"
+    compile "com.github.bumptech.glide:glide:4.8.0"
     // 'implementation' can't import to the new project.
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:0.25.0'
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core-common:0.25.0'
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:0.25.0'
-    implementation 'org.jetbrains.anko:anko-commons:0.10.5'
-    implementation 'androidx.appcompat:appcompat:1.0.0-rc02'
-    implementation 'androidx.recyclerview:recyclerview:1.0.0-rc01'
-    implementation 'androidx.palette:palette:1.0.0-rc02'
-    compile project(':kotlinshaver')
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlin_coroutine_version"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core-common:$kotlin_coroutine_version"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:$kotlin_coroutine_version"
+    implementation "org.jetbrains.anko:anko-commons:0.10.7-rc13"
+    implementation "androidx.appcompat:appcompat:1.0.0"
+    implementation "androidx.recyclerview:recyclerview:1.0.0-rc01"
+    implementation "androidx.palette:palette:1.0.0"
+    compile project(":kotlinshaver")
 }
 
 apply from: 'https://raw.githubusercontent.com/pokk/JCenterUploader/master/Uploader.gradle'
diff --git a/kotlinknifer/src/main/java/com/devrapid/kotlinknifer/Coroutine.kt b/kotlinknifer/src/main/java/com/devrapid/kotlinknifer/Coroutine.kt
index 334105c..3961f90 100644
--- a/kotlinknifer/src/main/java/com/devrapid/kotlinknifer/Coroutine.kt
+++ b/kotlinknifer/src/main/java/com/devrapid/kotlinknifer/Coroutine.kt
@@ -1,11 +1,16 @@
+@file:Suppress("NOTHING_TO_INLINE")
+
 package com.devrapid.kotlinknifer
 
-import kotlinx.coroutines.experimental.CoroutineScope
-import kotlinx.coroutines.experimental.android.UI
-import kotlinx.coroutines.experimental.launch
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers.Default
+import kotlinx.coroutines.Dispatchers.IO
+import kotlinx.coroutines.Dispatchers.Main
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+
+inline fun ui(noinline block: suspend CoroutineScope.() -> Unit) = GlobalScope.launch(Main, block = block)
+
+inline fun bkg(noinline block: suspend CoroutineScope.() -> Unit) = GlobalScope.launch(Default, block = block)
 
-/**
- * @author  Jieyi Wu
- * @since   2018/04/04
- */
-fun ui(block: suspend CoroutineScope.() -> Unit) = launch(UI, block = block)
\ No newline at end of file
+inline fun io(noinline block: suspend CoroutineScope.() -> Unit) = GlobalScope.launch(IO, block = block)
diff --git a/kotlinshaver/build.gradle b/kotlinshaver/build.gradle
index 908595c..4bba54f 100644
--- a/kotlinshaver/build.gradle
+++ b/kotlinshaver/build.gradle
@@ -3,11 +3,11 @@ apply plugin: 'kotlin'
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:0.25.0'
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core-common:0.25.0'
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlin_coroutine_version"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core-common:$kotlin_coroutine_version"
 
-    compile 'io.reactivex.rxjava2:rxkotlin:2.3.0'
-    compile 'io.reactivex.rxjava2:rxjava:2.2.1'
+    compile "io.reactivex.rxjava2:rxkotlin:2.3.0"
+    compile "io.reactivex.rxjava2:rxjava:2.2.3"
 }
 
 sourceCompatibility = "1.8"
diff --git a/kotlinshaver/src/main/java/com/devrapid/kotlinshaver/ArrayList.kt b/kotlinshaver/src/main/java/com/devrapid/kotlinshaver/ArrayList.kt
index 982c9a8..9d8fbf4 100644
--- a/kotlinshaver/src/main/java/com/devrapid/kotlinshaver/ArrayList.kt
+++ b/kotlinshaver/src/main/java/com/devrapid/kotlinshaver/ArrayList.kt
@@ -5,10 +5,10 @@ package com.devrapid.kotlinshaver
  * @since   11/8/17
  */
 fun <E> ArrayList<E>.removeRange(from: Int, to: Int): Boolean =
-    if (!(from in 0..size - 1 && to in 0..size - 1 && from > to)) {
+    if (!(from in 0 until size && to in 0 until size && from > to)) {
         false
     }
     else {
         subList(from, to).clear()
         true
-    }
\ No newline at end of file
+    }
diff --git a/sample/build.gradle b/sample/build.gradle
index 1632a66..73725d8 100644
--- a/sample/build.gradle
+++ b/sample/build.gradle
@@ -21,7 +21,7 @@ android {
 
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
-    implementation 'androidx.appcompat:appcompat:1.0.0-rc02'
+    implementation 'androidx.appcompat:appcompat:1.0.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.0-alpha2'
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
     implementation project(':kotlinknifer')