diff --git a/app/src/main/java/io/legado/app/ui/book/source/manage/BookSourceViewModel.kt b/app/src/main/java/io/legado/app/ui/book/source/manage/BookSourceViewModel.kt
index 99e3fc387..3ffd37543 100644
--- a/app/src/main/java/io/legado/app/ui/book/source/manage/BookSourceViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/book/source/manage/BookSourceViewModel.kt
@@ -31,7 +31,7 @@ class BookSourceViewModel(application: Application) : BaseViewModel(application)
 
     fun bottomSource(vararg sources: BookSource) {
         execute {
-            val maxOrder = App.db.bookSourceDao().minOrder + 1
+            val maxOrder = App.db.bookSourceDao().maxOrder + 1
             sources.forEachIndexed { index, bookSource ->
                 bookSource.customOrder = maxOrder + index
             }