diff --git a/app/build.gradle b/app/build.gradle
index cb11eee2f..01ca59663 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -115,6 +115,7 @@ dependencies {
     testImplementation 'junit:junit:4.13'
     androidTestImplementation 'androidx.test:runner:1.2.0'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+    implementation "com.android.support:multidex:1.0.3"
     //kotlin
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
 
diff --git a/app/src/main/java/io/legado/app/App.kt b/app/src/main/java/io/legado/app/App.kt
index bdf59ed54..eba95b8e9 100644
--- a/app/src/main/java/io/legado/app/App.kt
+++ b/app/src/main/java/io/legado/app/App.kt
@@ -1,6 +1,5 @@
 package io.legado.app
 
-import android.app.Application
 import android.app.NotificationChannel
 import android.app.NotificationManager
 import android.content.Context
@@ -9,6 +8,7 @@ import android.graphics.Color
 import android.os.Build
 import androidx.annotation.RequiresApi
 import androidx.appcompat.app.AppCompatDelegate
+import androidx.multidex.MultiDexApplication
 import com.jeremyliao.liveeventbus.LiveEventBus
 import io.legado.app.constant.AppConst.channelIdDownload
 import io.legado.app.constant.AppConst.channelIdReadAloud
@@ -28,7 +28,7 @@ import io.legado.app.utils.postEvent
 import io.legado.app.utils.putPrefInt
 
 @Suppress("DEPRECATION")
-class App : Application() {
+class App : MultiDexApplication() {
 
     companion object {
         @JvmStatic