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 505b6c7f5..ceefee13a 100644
--- a/app/src/main/java/io/legado/app/help/DirectLinkUpload.kt
+++ b/app/src/main/java/io/legado/app/help/DirectLinkUpload.kt
@@ -66,10 +66,11 @@ object DirectLinkUpload {
         return getRule()?.summary
     }
 
+    @keep
     data class Rule(
         var uploadUrl: String,
         var downloadUrlRule: String,
         var summary: String?
     )
 
-}
\ No newline at end of file
+}