diff --git a/app/src/main/java/io/legado/app/ui/readbook/ReadBookViewModel.kt b/app/src/main/java/io/legado/app/ui/readbook/ReadBookViewModel.kt
index 029be993e..0daa33437 100644
--- a/app/src/main/java/io/legado/app/ui/readbook/ReadBookViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/readbook/ReadBookViewModel.kt
@@ -33,6 +33,7 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
                                 ?.onSuccess { cList ->
                                     cList?.let {
                                         App.db.bookChapterDao().insert(*cList.toTypedArray())
+                                        chapterMaxIndex.postValue(cList.size)
                                     }
                                 }
                         } else {