diff --git a/doric-android/app/build.gradle b/doric-android/app/build.gradle
index 80dfa853..f691e9b8 100644
--- a/doric-android/app/build.gradle
+++ b/doric-android/app/build.gradle
@@ -1,12 +1,12 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 30
-    buildToolsVersion '30.0.1'
+    compileSdkVersion 31
+    buildToolsVersion '30.0.3'
     defaultConfig {
         applicationId "pub.doric.demo"
         minSdkVersion 19
-        targetSdkVersion 30
+        targetSdkVersion 31
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
diff --git a/doric-android/app/src/main/AndroidManifest.xml b/doric-android/app/src/main/AndroidManifest.xml
index 11a06015..51db1467 100644
--- a/doric-android/app/src/main/AndroidManifest.xml
+++ b/doric-android/app/src/main/AndroidManifest.xml
@@ -12,7 +12,9 @@
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
         <activity android:name=".PullableActivity" />
-        <activity android:name=".MainActivity">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 
diff --git a/doric-android/devkit/build.gradle b/doric-android/devkit/build.gradle
index 2da63654..761523cc 100644
--- a/doric-android/devkit/build.gradle
+++ b/doric-android/devkit/build.gradle
@@ -1,13 +1,12 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 30
-    buildToolsVersion "30.0.1"
-
+    compileSdkVersion 31
+    buildToolsVersion '30.0.3'
 
     defaultConfig {
         minSdkVersion 16
-        targetSdkVersion 30
+        targetSdkVersion 31
         versionCode 1
         versionName "1.0"
 
diff --git a/doric-android/doric/build.gradle b/doric-android/doric/build.gradle
index 03e083f0..ab7a034c 100644
--- a/doric-android/doric/build.gradle
+++ b/doric-android/doric/build.gradle
@@ -1,12 +1,12 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 30
-    buildToolsVersion '30.0.1'
+    compileSdkVersion 31
+    buildToolsVersion '30.0.3'
 
     defaultConfig {
         minSdkVersion 16
-        targetSdkVersion 30
+        targetSdkVersion 31
         versionCode 1
         versionName "1.0"
 
diff --git a/doric-android/jse/build.gradle b/doric-android/jse/build.gradle
index 73c1c56d..7c5311d3 100644
--- a/doric-android/jse/build.gradle
+++ b/doric-android/jse/build.gradle
@@ -1,12 +1,12 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 30
-    buildToolsVersion '30.0.1'
+    compileSdkVersion 31
+    buildToolsVersion '30.0.3'
 
     defaultConfig {
         minSdkVersion 16
-        targetSdkVersion 30
+        targetSdkVersion 31
         versionCode 1
         versionName "1.0"