diff --git a/app/src/main/java/io/legado/app/ui/readbook/config/BgTextConfigDialog.kt b/app/src/main/java/io/legado/app/ui/readbook/config/BgTextConfigDialog.kt
index 381c23f00..be505737d 100644
--- a/app/src/main/java/io/legado/app/ui/readbook/config/BgTextConfigDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/readbook/config/BgTextConfigDialog.kt
@@ -1,5 +1,6 @@
 package io.legado.app.ui.readbook.config
 
+import android.content.DialogInterface
 import android.graphics.Color
 import android.os.Bundle
 import android.util.DisplayMetrics
@@ -52,6 +53,11 @@ class BgTextConfigDialog : DialogFragment() {
         initView()
     }
 
+    override fun onDismiss(dialog: DialogInterface) {
+        super.onDismiss(dialog)
+        ReadBookConfig.save()
+    }
+
     private fun initData() = with(ReadBookConfig.getConfig()) {
         sw_dark_status_icon.isChecked = statusIconDark()
     }