diff --git a/app/src/main/java/io/legado/app/ui/book/cache/CacheActivity.kt b/app/src/main/java/io/legado/app/ui/book/cache/CacheActivity.kt
index 0f6524274..3f7f2419f 100644
--- a/app/src/main/java/io/legado/app/ui/book/cache/CacheActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/cache/CacheActivity.kt
@@ -49,8 +49,7 @@ class CacheActivity : VMBaseActivity<ActivityCacheBookBinding, CacheViewModel>()
     private val groupList: ArrayList<BookGroup> = arrayListOf()
     private var groupId: Long = -1
 
-    override val viewModel: CacheViewModel
-            by viewModels()
+    override val viewModel: CacheViewModel by viewModels()
 
     override fun getViewBinding(): ActivityCacheBookBinding {
         return ActivityCacheBookBinding.inflate(layoutInflater)