diff --git a/android/build.gradle b/android/build.gradle
index 1ac4e7c..4667ae2 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -9,7 +9,7 @@ buildscript {
 
     dependencies {
         classpath 'com.android.tools.build:gradle:3.3.1'
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.20"
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.3.41"
     }
 }
 
@@ -42,8 +42,7 @@ android {
 }
 
 dependencies {
-    implementation 'androidx.appcompat:appcompat:1.0.2'
-    implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.3.20'
+    implementation 'androidx.appcompat:appcompat:1.0.0'
+    implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.3.41'
     implementation 'me.dm7.barcodescanner:zxing:1.9.13'
-    api 'com.google.android.material:material:1.0.0'
 }
diff --git a/android/src/main/kotlin/com/apptreesoftware/barcodescan/BarcodeScannerActivity.kt b/android/src/main/kotlin/com/apptreesoftware/barcodescan/BarcodeScannerActivity.kt
index 340e7db..e33255a 100644
--- a/android/src/main/kotlin/com/apptreesoftware/barcodescan/BarcodeScannerActivity.kt
+++ b/android/src/main/kotlin/com/apptreesoftware/barcodescan/BarcodeScannerActivity.kt
@@ -5,10 +5,10 @@ import android.app.Activity
 import android.content.Intent
 import android.content.pm.PackageManager
 import android.os.Bundle
-import androidx.core.app.ActivityCompat
-import androidx.core.content.ContextCompat
 import android.view.Menu
 import android.view.MenuItem
+import androidx.core.app.ActivityCompat
+import androidx.core.content.ContextCompat
 import com.google.zxing.Result
 import me.dm7.barcodescanner.zxing.ZXingScannerView
 
@@ -36,11 +36,11 @@ class BarcodeScannerActivity : Activity(), ZXingScannerView.ResultHandler {
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
         if (scannerView.flash) {
             val item = menu.add(0,
-                    TOGGLE_FLASH, 0, "Flash Off")
+                    TOGGLE_FLASH, 0, "关闭闪光灯")
             item.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS)
         } else {
             val item = menu.add(0,
-                    TOGGLE_FLASH, 0, "Flash On")
+                    TOGGLE_FLASH, 0, "开启闪光灯")
             item.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS)
         }
         return super.onCreateOptionsMenu(menu)
diff --git a/example/android/app/build.gradle b/example/android/app/build.gradle
index 614df20..30d4008 100644
--- a/example/android/app/build.gradle
+++ b/example/android/app/build.gradle
@@ -17,7 +17,7 @@ apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
     compileSdkVersion 28
-    buildToolsVersion "27.0.3"
+    buildToolsVersion "28.0.3"
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'