diff --git a/.circleci/config.yml b/.circleci/config.yml
index 714e09c..64bd600 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -3,7 +3,7 @@ jobs:
   build:
     working_directory: ~/code
     docker:
-      - image: shadowsocks/shadowsocks-android:circleci
+      - image: shadowsocks/android-ndk-go
     environment:
       JVM_OPTS: -Xmx3500m
       GRADLE_OPTS: -Dorg.gradle.workers.max=1 -Dorg.gradle.daemon=false -Dkotlin.compiler.execution.strategy="in-process"
diff --git a/app/build.gradle b/app/build.gradle
index 19d89bf..24cd046 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -18,7 +18,6 @@ def getCurrentFlavor() {
 }
 
 android {
-    buildToolsVersion "28.0.3"
     compileSdkVersion 28
     defaultConfig {
         applicationId "com.github.shadowsocks.plugin.v2ray"
@@ -55,15 +54,6 @@ task goBuild(type: Exec) {
     }
 }
 
-task goClean(type: Exec) {
-    if (Os.isFamily(Os.FAMILY_WINDOWS)) {
-        println "Warning: Building on Windows is not supported"
-    } else {
-        executable "sh"
-        args "-c", "src/clean.bash"
-    }
-}
-
 tasks.whenTaskAdded { task ->
     if ((task.name == 'javaPreCompileDebug' ||
             task.name == 'javaPreCompileRelease')) {
@@ -73,13 +63,13 @@ tasks.whenTaskAdded { task ->
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation "androidx.preference:preference:1.1.0-alpha03"
-    implementation 'com.github.shadowsocks:plugin:1.1.0'
+    implementation "androidx.preference:preference:1.1.0-beta01"
+    implementation 'com.github.shadowsocks:plugin:1.2.0'
     implementation 'com.takisoft.preferencex:preferencex-simplemenu:1.0.0'
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlinVersion"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlinVersion"
     testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'androidx.test:runner:1.1.1'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
+    androidTestImplementation 'androidx.test:runner:1.2.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
 }
 
 ext.abiCodes = ['armeabi-v7a': 1, 'arm64-v8a': 2, x86: 3, x86_64: 4]
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 7c75d70..4a79bc6 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -22,6 +22,8 @@
             </intent-filter>
             <meta-data android:name="com.github.shadowsocks.plugin.id"
                        android:value="v2ray"/>
+            <meta-data android:name="com.github.shadowsocks.plugin.executable_path"
+                       android:value="libv2ray.so"/>
         </provider>
         <activity android:name=".ConfigActivity">
             <intent-filter>
diff --git a/app/src/main/go/v2ray-plugin b/app/src/main/go/v2ray-plugin
index d3c1201..e5ada30 160000
--- a/app/src/main/go/v2ray-plugin
+++ b/app/src/main/go/v2ray-plugin
@@ -1 +1 @@
-Subproject commit d3c12013b948ed7177cb1cde41e23d50256e3ae4
+Subproject commit e5ada302d39b0aef8e167701c94596e41e805ec1
diff --git a/app/src/main/java/com/github/shadowsocks/plugin/v2ray/ConfigFragment.kt b/app/src/main/java/com/github/shadowsocks/plugin/v2ray/ConfigFragment.kt
index e3a7d02..a921081 100644
--- a/app/src/main/java/com/github/shadowsocks/plugin/v2ray/ConfigFragment.kt
+++ b/app/src/main/java/com/github/shadowsocks/plugin/v2ray/ConfigFragment.kt
@@ -39,12 +39,12 @@ class ConfigFragment : PreferenceFragmentCompat(), Preference.OnPreferenceChange
         const val REQUEST_BROWSE_CERTIFICATE = 1
     }
 
-    private val mode by lazy { findPreference<ListPreference>("mode") }
-    private val host by lazy { findPreference<EditTextPreference>("host") }
-    private val path by lazy { findPreference<EditTextPreference>("path") }
-    private val mux by lazy { findPreference<EditTextPreference>("mux") }
-    private val certRaw by lazy { findPreference<EditTextPreference>("certRaw") }
-    private val loglevel by lazy { findPreference<ListPreference>("loglevel") }
+    private val mode by lazy { findPreference<ListPreference>("mode")!! }
+    private val host by lazy { findPreference<EditTextPreference>("host")!! }
+    private val path by lazy { findPreference<EditTextPreference>("path")!! }
+    private val mux by lazy { findPreference<EditTextPreference>("mux")!! }
+    private val certRaw by lazy { findPreference<EditTextPreference>("certRaw")!! }
+    private val loglevel by lazy { findPreference<ListPreference>("loglevel")!! }
 
     private fun readMode(value: String = mode.value) = when (value) {
         "websocket-http" -> Pair(null, false)
diff --git a/build.gradle b/build.gradle
index 84f7511..c76c0ad 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,7 +4,7 @@ apply plugin: 'com.github.ben-manes.versions'
 
 buildscript {
     ext {
-        kotlinVersion = '1.3.21'
+        kotlinVersion = '1.3.31'
         minSdkVersion = 21
     }
     repositories {
@@ -12,8 +12,8 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.3.1'
-        classpath 'com.github.ben-manes:gradle-versions-plugin:0.20.0'
+        classpath 'com.android.tools.build:gradle:3.5.0-beta04'
+        classpath 'com.github.ben-manes:gradle-versions-plugin:0.21.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion"
     }
 }
diff --git a/gradle.properties b/gradle.properties
index 0c83f54..23c9085 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -7,7 +7,6 @@
 # Specifies the JVM arguments used for the daemon process.
 # The setting is particularly useful for tweaking memory settings.
 android.enableJetifier=true
-android.enableR8=true
 android.enableR8.fullMode=true
 android.useAndroidX=true
 org.gradle.jvmargs=-Xmx1536m
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index a5e6c5b..cc1bb20 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-5.2.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip