diff --git a/ocr_ui/build.gradle b/ocr_ui/build.gradle
index fd0ce5c..b9747c9 100644
--- a/ocr_ui/build.gradle
+++ b/ocr_ui/build.gradle
@@ -4,12 +4,12 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 27
-    buildToolsVersion "27.0.2"
 
+    compileSdkVersion 30
+    buildToolsVersion "30.0.3"
     defaultConfig {
-        minSdkVersion 14
-        targetSdkVersion 27
+        minSdkVersion 23
+        targetSdkVersion 30
         versionCode 1
         versionName "1.0"
 
diff --git a/ocr_ui/src/main/AndroidManifest.xml b/ocr_ui/src/main/AndroidManifest.xml
index 30315a3..9105dfd 100644
--- a/ocr_ui/src/main/AndroidManifest.xml
+++ b/ocr_ui/src/main/AndroidManifest.xml
@@ -2,25 +2,30 @@
   ~ Copyright (C) 2017 Baidu, Inc. All Rights Reserved.
   -->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-          package="com.baidu.ocr.ui">
+    xmlns:tools="http://schemas.android.com/tools"
+    package="com.baidu.ocr.ui">
 
-    <uses-permission android:name="android.permission.CAMERA"/>
-    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
-    <uses-feature android:name="android.hardware.camera2.full"/>
-    <uses-feature android:name="android.hardware.camera"/>
+    <uses-permission android:name="android.permission.CAMERA" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+
+    <uses-feature android:name="android.hardware.camera2.full" />
+    <uses-feature android:name="android.hardware.camera" />
     <uses-feature android:name="android.hardware.camera.autofocus" />
 
-    <application android:allowBackup="true"
-                 android:label="@string/app_name"
-                 android:icon="@mipmap/ic_launcher"
-                 android:supportsRtl="true"
-                 android:vmSafeMode="true"
-                 android:theme="@style/AppTheme">
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme"
+        android:vmSafeMode="true"
+        tools:replace="android:allowBackup,android:icon">
 
-        <activity android:name="com.baidu.ocr.ui.camera.CameraActivity"
-                  android:configChanges="screenSize|orientation"
-                  android:theme="@android:style/Theme.Holo.NoActionBar.Fullscreen"/>
+        <activity
+            android:name="com.baidu.ocr.ui.camera.CameraActivity"
+            android:configChanges="screenSize|orientation"
+            android:theme="@android:style/Theme.Holo.NoActionBar.Fullscreen" />
 
     </application>