diff --git a/app/src/main/java/io/legado/app/help/ThemeConfig.kt b/app/src/main/java/io/legado/app/help/ThemeConfig.kt
index f0434680b..5061d129f 100644
--- a/app/src/main/java/io/legado/app/help/ThemeConfig.kt
+++ b/app/src/main/java/io/legado/app/help/ThemeConfig.kt
@@ -7,7 +7,6 @@ import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.constant.EventBus
 import io.legado.app.constant.PreferKey
-import io.legado.app.help.coroutine.Coroutine
 import io.legado.app.utils.*
 import java.io.File
 
@@ -32,13 +31,14 @@ object ThemeConfig {
     }
 
     fun save() {
-        Coroutine.async {
-            synchronized(this) {
-                val json = GSON.toJson(configList)
-                FileUtils.deleteFile(configFilePath)
-                FileUtils.createFileIfNotExist(configFilePath).writeText(json)
-            }
-        }
+        val json = GSON.toJson(configList)
+        FileUtils.deleteFile(configFilePath)
+        FileUtils.createFileIfNotExist(configFilePath).writeText(json)
+    }
+
+    fun delConfig(index: Int) {
+        configList.removeAt(index)
+        save()
     }
 
     fun addConfig(json: String): Boolean {
@@ -116,9 +116,15 @@ object ThemeConfig {
 
     fun saveNightTheme(context: Context, name: String) {
         val primary =
-            context.getPrefInt(PreferKey.cNPrimary, context.getCompatColor(R.color.md_blue_grey_600))
+            context.getPrefInt(
+                PreferKey.cNPrimary,
+                context.getCompatColor(R.color.md_blue_grey_600)
+            )
         val accent =
-            context.getPrefInt(PreferKey.cNAccent, context.getCompatColor(R.color.md_deep_orange_800))
+            context.getPrefInt(
+                PreferKey.cNAccent,
+                context.getCompatColor(R.color.md_deep_orange_800)
+            )
         val background =
             context.getPrefInt(PreferKey.cNBackground, context.getCompatColor(R.color.md_grey_900))
         val bBackground =
diff --git a/app/src/main/java/io/legado/app/ui/config/ThemeListDialog.kt b/app/src/main/java/io/legado/app/ui/config/ThemeListDialog.kt
index b090332e4..d7000b127 100644
--- a/app/src/main/java/io/legado/app/ui/config/ThemeListDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/config/ThemeListDialog.kt
@@ -89,8 +89,7 @@ class ThemeListDialog : BaseDialogFragment(), Toolbar.OnMenuItemClickListener {
     fun delete(index: Int) {
         alert(R.string.delete, R.string.sure_del) {
             okButton {
-                ThemeConfig.configList.removeAt(index)
-                ThemeConfig.save()
+                ThemeConfig.delConfig(index)
                 initData()
             }
             noButton()