diff --git a/app/src/main/java/io/legado/app/constant/PreferKey.kt b/app/src/main/java/io/legado/app/constant/PreferKey.kt
index 1f99d7cba..6a47308d5 100644
--- a/app/src/main/java/io/legado/app/constant/PreferKey.kt
+++ b/app/src/main/java/io/legado/app/constant/PreferKey.kt
@@ -1,7 +1,6 @@
 package io.legado.app.constant
 
 object PreferKey {
-    const val versionCode = "versionCode"
     const val language = "language"
     const val themeMode = "themeMode"
     const val hideStatusBar = "hideStatusBar"
diff --git a/app/src/main/java/io/legado/app/help/LocalConfig.kt b/app/src/main/java/io/legado/app/help/LocalConfig.kt
index 11c9ce430..686dd93f4 100644
--- a/app/src/main/java/io/legado/app/help/LocalConfig.kt
+++ b/app/src/main/java/io/legado/app/help/LocalConfig.kt
@@ -5,10 +5,19 @@ import androidx.core.content.edit
 import io.legado.app.App
 
 object LocalConfig {
+    private const val versionCodeKey = "versionCode"
 
     private val localConfig =
         App.INSTANCE.getSharedPreferences("local", Context.MODE_PRIVATE)
 
+    var versionCode
+        get() = localConfig.getInt(versionCodeKey, 0)
+        set(value) {
+            localConfig.edit {
+                putInt(versionCodeKey, value)
+            }
+        }
+
     val isFirstOpenApp: Boolean
         get() {
             val value = localConfig.getBoolean("firstOpen", true)
diff --git a/app/src/main/java/io/legado/app/help/storage/Restore.kt b/app/src/main/java/io/legado/app/help/storage/Restore.kt
index cd100503b..8c535926e 100644
--- a/app/src/main/java/io/legado/app/help/storage/Restore.kt
+++ b/app/src/main/java/io/legado/app/help/storage/Restore.kt
@@ -52,7 +52,6 @@ object Restore {
 
     //默认忽略keys
     private val ignorePrefKeys = arrayOf(
-        PreferKey.versionCode,
         PreferKey.defaultCover
     )
     private val readPrefKeys = arrayOf(
diff --git a/app/src/main/java/io/legado/app/ui/main/MainActivity.kt b/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
index 66970d7cc..028506550 100644
--- a/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
@@ -27,7 +27,9 @@ import io.legado.app.ui.main.explore.ExploreFragment
 import io.legado.app.ui.main.my.MyFragment
 import io.legado.app.ui.main.rss.RssFragment
 import io.legado.app.ui.widget.dialog.TextDialog
-import io.legado.app.utils.*
+import io.legado.app.utils.getViewModel
+import io.legado.app.utils.hideSoftInput
+import io.legado.app.utils.observeEvent
 import kotlinx.android.synthetic.main.activity_main.*
 import org.jetbrains.anko.toast
 
@@ -101,8 +103,8 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
     }
 
     private fun upVersion() {
-        if (getPrefInt(PreferKey.versionCode) != App.versionCode) {
-            putPrefInt(PreferKey.versionCode, App.versionCode)
+        if (LocalConfig.versionCode != App.versionCode) {
+            LocalConfig.versionCode = App.versionCode
             if (LocalConfig.isFirstOpenApp) {
                 val text = String(assets.open("help/appHelp.md").readBytes())
                 TextDialog.show(supportFragmentManager, text, TextDialog.MD)