diff --git a/mobile/src/main/AndroidManifest.xml b/mobile/src/main/AndroidManifest.xml
index 24bec2d51..b8f1d83de 100644
--- a/mobile/src/main/AndroidManifest.xml
+++ b/mobile/src/main/AndroidManifest.xml
@@ -66,7 +66,7 @@
             </intent-filter>
         </receiver>
 
-        <receiver android:name="com.oasisfeng.island.settings.IslandSettingsActivity$Enabler"> <!-- Enable SettingsActivity then disable self -->
+        <receiver android:name="com.oasisfeng.island.settings.IslandSettingsActivity$Enabler"> <!-- Enable IslandSettingsActivity then disable self -->
             <intent-filter>
                 <action android:name="android.intent.action.BOOT_COMPLETED" />
                 <action android:name="android.intent.action.MY_PACKAGE_REPLACED" />
diff --git a/mobile/src/main/java/com/oasisfeng/island/settings/IslandSettingsActivity.kt b/mobile/src/main/java/com/oasisfeng/island/settings/IslandSettingsActivity.kt
index 0ed935077..867b4cbd8 100644
--- a/mobile/src/main/java/com/oasisfeng/island/settings/IslandSettingsActivity.kt
+++ b/mobile/src/main/java/com/oasisfeng/island/settings/IslandSettingsActivity.kt
@@ -1,3 +1,5 @@
+@file:Suppress("DEPRECATION")
+
 package com.oasisfeng.island.settings
 
 import android.Manifest.permission.*
@@ -39,7 +41,7 @@ import com.oasisfeng.island.util.Users
  *
  * Created by Oasis on 2019-10-12.
  */
-class IslandSettingsFragment: @Suppress("DEPRECATION") android.preference.PreferenceFragment() {
+class IslandSettingsFragment: android.preference.PreferenceFragment() {
 
     override fun onResume() {
         super.onResume()
@@ -150,7 +152,7 @@ class IslandSettingsActivity: Activity() {
         setContentView(R.layout.activity_main)
         title = intent?.getStringExtra(Intent.EXTRA_TITLE)
                 ?: getString(R.string.tab_island).let { if (Users.current() == Users.profile) it else "$it (${Users.toId(Users.current())})"}
-        @Suppress("DEPRECATION") fragmentManager.beginTransaction().replace(android.R.id.content, IslandSettingsFragment()).commit()
+        fragmentManager.beginTransaction().replace(android.R.id.content, IslandSettingsFragment()).commit()
     }
 
     class Enabler: BroadcastReceiver() {    // One-time enabler for
diff --git a/open/build.gradle b/open/build.gradle
index 6c293c8a9..4c86fcb6b 100644
--- a/open/build.gradle
+++ b/open/build.gradle
@@ -17,8 +17,4 @@ android {
 dependencies {
     implementation project(':shared')
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    implementation "androidx.core:core-ktx:1.0.2"
-}
-repositories {
-    mavenCentral()
 }