diff --git a/app/build.gradle b/app/build.gradle
index 77aa3ff..0e355f0 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,6 +1,6 @@
 apply plugin: 'com.android.application'
-apply plugin: 'kotlin-android'
-apply plugin: 'kotlin-android-extensions'
+//apply plugin: 'kotlin-android'
+//apply plugin: 'kotlin-android-extensions'
 
 android {
     compileSdkVersion build_versions.compileSdk
@@ -30,9 +30,9 @@ android {
         targetCompatibility JavaVersion.VERSION_1_8
     }
 
-    kotlinOptions {
-        jvmTarget = '1.8'
-    }
+//    kotlinOptions {
+//        jvmTarget = '1.8'
+//    }
 }
 
 dependencies {
@@ -45,8 +45,8 @@ dependencies {
     implementation deps.androidx.appcompat
     implementation deps.androidx.constraintlayout
 
-    implementation deps.kotlin
-    implementation deps.corektx
+//    implementation deps.kotlin
+//    implementation deps.corektx
 
     implementation deps.easypermissions
 
diff --git a/app/release/app-release.apk b/app/release/app-release.apk
index ffc3f17..c64af2e 100644
Binary files a/app/release/app-release.apk and b/app/release/app-release.apk differ
diff --git a/build.gradle b/build.gradle
index b937de6..fd7429c 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,13 +6,14 @@ buildscript {
 
     repositories {
         google()
+        maven { url 'https://maven.aliyun.com/repository/public/' }
         mavenCentral()
     }
 
 
     dependencies {
         classpath "com.android.tools.build:gradle:$versions.gralde"
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$versions.kotlin"
+//        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$versions.kotlin"
 //        classpath "com.novoda:bintray-release:$versions.bintray_release"
         classpath "com.vanniktech:gradle-maven-publish-plugin:$versions.mavenPublish"
         // NOTE: Do not place your application dependencies here; they belong
@@ -23,6 +24,7 @@ buildscript {
 allprojects {
     repositories {
         google()
+        maven { url 'https://maven.aliyun.com/repository/public/' }
         mavenCentral()
 //        jcenter() // Warning: this repository is going to shut down soon
     }
diff --git a/versions.gradle b/versions.gradle
index 59a3710..270e383 100644
--- a/versions.gradle
+++ b/versions.gradle
@@ -58,9 +58,9 @@ test.espresso = "androidx.test.espresso:espresso-core:$versions.espresso"
 deps.test = test
 
 
-deps.kotlin = "org.jetbrains.kotlin:kotlin-stdlib:$versions.kotlin"
-
-deps.corektx = "androidx.core:core-ktx:$versions.coreKtx"
+//deps.kotlin = "org.jetbrains.kotlin:kotlin-stdlib:$versions.kotlin"
+//
+//deps.corektx = "androidx.core:core-ktx:$versions.coreKtx"
 
 //zxing
 deps.zxing = "com.google.zxing:core:$versions.zxing"