diff --git a/app/src/main/java/io/legado/app/help/DirectLinkUpload.kt b/app/src/main/java/io/legado/app/help/DirectLinkUpload.kt
index ceefee13a..5a5957fb1 100644
--- a/app/src/main/java/io/legado/app/help/DirectLinkUpload.kt
+++ b/app/src/main/java/io/legado/app/help/DirectLinkUpload.kt
@@ -66,7 +66,7 @@ object DirectLinkUpload {
         return getRule()?.summary
     }
 
-    @keep
+    @Keep
     data class Rule(
         var uploadUrl: String,
         var downloadUrlRule: String,